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A value c c is said to be a root of a polynomial p(x) p x if p(c)=0 p c = 0 ..
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One learns about the "factor theorem," typically in a second course on algebra, as a way to find all roots that are rational numbers. One also learns how to find roots of all quadratic polynomials, using square roots (arising from the discriminant) when necessary. There are more advanced formulas for expressing roots of cubic and quartic polynomials, and also a number of numeric methods for approximating roots of arbitrary polynomials. These use methods from complex analysis as well as sophisticated numerical algorithms, and indeed, this is an area of ongoing research and development.
Systems of linear equations are often solved using Gaussian elimination or related methods. This too is typically encountered in secondary or college math curricula. More advanced methods are needed to find roots of simultaneous systems of nonlinear equations. Similar remarks hold for working with systems of inequalities: the linear case can be handled using methods covered in linear algebra courses, whereas higher-degree polynomial systems typically require more sophisticated computational tools.
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Word Problem: Rachel has 17 apples. She gives some to Sarah. Sarah now has 8 apples. How many apples did Rachel give her?
Simplified Equation: 17 - x = 8
Word Problem: Rhonda has 12 marbles more than Douglas. Douglas has 6 marbles more than Bertha. Rhonda has twice as many marbles as Bertha has. How many marbles does Douglas have?
Variables: Rhonda's marbles is represented by (r), Douglas' marbles is represented by (d) and Bertha's marbles is represented by (b)
Simplified Equation: {r = d + 12, d = b + 6, r = 2 �� b}
Word Problem: if there are 40 cookies all together and Angela takes 10 and Brett takes 5 how many are left?
Simplified: 40 - 10 - 5
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Welcome to OnSolver.com OnSolver.com Home PageOn our site OnSolver.com presented a large number of task in mathematics that you can solve online free of charge on a variety of topics: calculation of integrals and derivatives, finding the sum of the series, the solution of differential equations, etc. The main features of our website is easy to find the required task, completeness submitted online calculators and availability of a detailed solutions to all the problems with all the explanations necessary to understand solutions. Now you do not need to look for the right solution on the Internet: user-friendly menu allows you to quickly switch between tasks. List of online-calculators: ©Copyright 2014 Mathematical problem solving ") //-->If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Unit 1: Algebra foundationsUnit 2: solving equations & inequalities, unit 3: working with units, unit 4: linear equations & graphs, unit 5: forms of linear equations, unit 6: systems of equations, unit 7: inequalities (systems & graphs), unit 8: functions, unit 9: sequences, unit 10: absolute value & piecewise functions, unit 11: exponents & radicals, unit 12: exponential growth & decay, unit 13: quadratics: multiplying & factoring, unit 14: quadratic functions & equations, unit 15: irrational numbers, unit 16: creativity in algebra.
Additional menuKhan Academy Blog Free Math Worksheets — Over 100k free practice problems on Khan AcademyLooking for free math worksheets. You’ve found something even better! That’s because Khan Academy has over 100,000 free practice questions. And they’re even better than traditional math worksheets – more instantaneous, more interactive, and more fun! Just choose your grade level or topic to get access to 100% free practice questions:Kindergarten, basic geometry, pre-algebra, algebra basics, high school geometry.
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What do Khan Academy’s interactive math worksheets look like?Here’s an example: What are teachers saying about Khan Academy’s interactive math worksheets?“My students love Khan Academy because they can immediately learn from their mistakes, unlike traditional worksheets.” Is Khan Academy free?Khan Academy’s practice questions are 100% free—with no ads or subscriptions. What do Khan Academy’s interactive math worksheets cover?Our 100,000+ practice questions cover every math topic from arithmetic to calculus, as well as ELA, Science, Social Studies, and more. Is Khan Academy a company?Khan Academy is a nonprofit with a mission to provide a free, world-class education to anyone, anywhere. Want to get even more out of Khan Academy?Then be sure to check out our teacher tools . They’ll help you assign the perfect practice for each student from our full math curriculum and track your students’ progress across the year. Plus, they’re also 100% free — with no subscriptions and no ads. Get KhanmigoThe best way to learn and teach with AI is here. Ace the school year with our AI-powered guide, Khanmigo. For learners For teachers For parents Effective Problem-Solving Techniques in BusinessProblem solving is an increasingly important soft skill for those in business. The Future of Jobs Survey by the World Economic Forum drives this point home. According to this report, complex problem solving is identified as one of the top 15 skills that will be sought by employers in 2025, along with other soft skills such as analytical thinking, creativity and leadership. Dr. Amy David , clinical associate professor of management for supply chain and operations management, spoke about business problem-solving methods and how the Purdue University Online MBA program prepares students to be business decision-makers. Why Are Problem-Solving Skills Essential in Leadership Roles?Every business will face challenges at some point. Those that are successful will have people in place who can identify and solve problems before the damage is done. “The business world is constantly changing, and companies need to be able to adapt well in order to produce good results and meet the needs of their customers,” David says. “They also need to keep in mind the triple bottom line of ‘people, profit and planet.’ And these priorities are constantly evolving.” To that end, David says people in management or leadership need to be able to handle new situations, something that may be outside the scope of their everyday work. “The name of the game these days is change—and the speed of change—and that means solving new problems on a daily basis,” she says. The pace of information and technology has also empowered the customer in a new way that provides challenges—or opportunities—for businesses to respond. “Our customers have a lot more information and a lot more power,” she says. “If you think about somebody having an unhappy experience and tweeting about it, that’s very different from maybe 15 years ago. Back then, if you had a bad experience with a product, you might grumble about it to one or two people.” David says that this reality changes how quickly organizations need to react and respond to their customers. And taking prompt and decisive action requires solid problem-solving skills. What Are Some of the Most Effective Problem-Solving Methods?David says there are a few things to consider when encountering a challenge in business. “When faced with a problem, are we talking about something that is broad and affects a lot of people? Or is it something that affects a select few? Depending on the issue and situation, you’ll need to use different types of problem-solving strategies,” she says. Using TechniquesThere are a number of techniques that businesses use to problem solve. These can include:
“We have a lot of these different tools,” David says. “Which one to use when is going to be dependent on the problem itself, the level of the stakeholders, the number of different stakeholder groups and so on.” Each of the techniques outlined above uses the same core steps of problem solving:
Data drives a lot of daily decisions in business and beyond. Analytics have also been deployed to problem solve. “We have specific classes around storytelling with data and how you convince your audience to understand what the data is,” David says. “Your audience has to trust the data, and only then can you use it for real decision-making.” Data can be a powerful tool for identifying larger trends and making informed decisions when it’s clearly understood and communicated. It’s also vital for performance monitoring and optimization. How Is Problem Solving Prioritized in Purdue’s Online MBA?The courses in the Purdue Online MBA program teach problem-solving methods to students, keeping them up to date with the latest techniques and allowing them to apply their knowledge to business-related scenarios. “I can give you a model or a tool, but most of the time, a real-world situation is going to be a lot messier and more valuable than what we’ve seen in a textbook,” David says. “Asking students to take what they know and apply it to a case where there’s not one single correct answer is a big part of the learning experience.” Make Your Own Decision to Further Your CareerAn online MBA from Purdue University can help advance your career by teaching you problem-solving skills, decision-making strategies and more. Reach out today to learn more about earning an online MBA with Purdue University . If you would like to receive more information about pursuing a business master’s at the Mitchell E. Daniels, Jr. School of Business, please fill out the form and a program specialist will be in touch! Connect With Us Game CentralXbox Live Goes Down in Nearly Seven-Hour OutageBy Todd Spangler Todd SpanglerNY Digital Editor
UPDATE, 7/2, 9:01 p.m. ET: Microsoft said it resolved the technical problems that had knocked out Xbox Live for nearly seven hours. “Users should no longer be encountering issues signing in to Xbox Live and services,” the Xbox Support account on X posted at 8:49 p.m. ET. “Thank you for your patience, game on!” Xbox Live, Microsoft’s multiplayer gaming and digital media network, was suffering a major outage Tuesday as thousands of users reported problems accessing it. Popular on VarietyRelated stories, social video vs. paid streaming: a report on the race to replace tv, 1968 redux cbs news' john dickerson on post-debate presidential campaign turmoil and why joe biden is not having an lbj moment. Other Microsoft-operated services, including Minecraft and the Microsoft Store, also had a high level of user error reports on Downdetector. The official Xbox Support account on X posted at 2:55 pm. ET, “We are aware that some users have been disconnected from Xbox Live. We’re investigating!” The message directed users to the Xbox status page — which eventually was updated to say that a major outage of the “Account & profile” service was reported at 2:07 p.m. ET. “You may not be able to sign-in to your Xbox profile, may be disconnected while signed in, or have other related problems,” the message on the Xbox status page said. “Features that require sign-in like most games, apps and social activity won’t be available.” Microsoft requires users to have an Xbox Live account (which is free to set up) to play games online and access other experiences on the Xbox console, Windows PC and Xbox mobile apps. Xbox Live users took to social media to vent about the technical problems: @XboxSupport what’s happening? Can’t log in. Can’t watch YT, can’t play games… whatsup xbox /microsoft 😭?? — keep swimming (@lostislander00) July 2, 2024 @XboxSupport Xbox Live is apparently so broken right now that I can’t even report that it’s down pic.twitter.com/38oRux850n — KirstenHeffron.bsky.social (@KirstenHeffron) July 2, 2024 @XboxSupport any reason why this is happening? It’s been 20 minutes and I still can’t log in. I logged in fine this morning. Also I can’t register the outage on the Microsoft website 🤬 pic.twitter.com/A0XuNaP6N6 — Chris Topher (@topbottom23) July 2, 2024 @XboxSupport is there a problem with Xbox live right now? I’ve reset my XSX a couple times and I keep getting this error. pic.twitter.com/GZGZeVxI5n — Jeff J (@MYTHODDIKAL) July 2, 2024 More from VarietyLana del rey and quavo set release date for ‘tough’ collaboration, regulators shouldn’t blow the whistle on venu sports just yet, lana del rey on taylor swift’s success: ‘she wants it more than anyone’, lana del rey and quavo snuggle up in the countryside for new ‘tough’ music video, what media & entertainment execs are saying about using gen ai: the vip+/harrisx spring 2024 survey, more from our brands, biden says he’s not dropping out unless ‘lord almighty comes down’, how paris’s dining, hotel, and art scenes got their groove back—just in time for the olympics, sportico transactions: moves and mergers roundup for may 3, the best loofahs and body scrubbers, according to dermatologists, joe biden blames a ‘really bad cold’ for poor performance in first post-debate tv interview — watch video, verify it's you, please log in. Xbox Live Suffers Widespread Outage, Xbox Support 'Investigating'Services have returned after a seven-hour outage.. Update: Xbox Live services are available once again. Xbox has not commented on the cause of the outage but has since confirmed the users should be able to use the service again. Users should no longer be encountering issues signing in to Xbox Live and services. Thank you for your patience, game on! https://t.co/jw7EOmyyoL — Xbox Support (@XboxSupport) July 3, 2024 Xbox Live was unavailable for approximately seven hours. Xbox Live is currently down, affecting thousands of gaming fans. Players who attempted to log into their accounts this afternoon found they were unable to sign in and play games as usual. Microsoft describes the incident as a “major outage” on its official Xbox Live status page . The company says troubles with its service began just after 2 p.m. ET, with the website Downdetector reporting a peak of more than 38,000 individual outage reports around 3 p.m. ET. Though a select few have shared that they’ve been able to eventually sign into Xbox Live, Microsoft says the sign-in issues affect Xbox Series X | S, Xbox One, and Xbox 360 consoles as well as mobile devices, web services, cloud gaming, backward compatibility, and Xbox on Windows. No explanation for the outage has been shared, but in the meantime, Microsoft said in an X/Twitter post that it is investigating the issue while directing concerned players to head to its status page for updates. Our investigation is taking longer than expected, thank you for your patience and reports! We'll continue to update here and on our status page, https://t.co/kQKp1MgssY https://t.co/nNYKQKZcxL — Xbox Support (@XboxSupport) July 2, 2024 “You may not be able to sign-in to your Xbox profile, may be disconnected while signed in, or have other related problems,” the status page says at the time of this story’s publication. “Features that require sign-in like most games, apps and social activity won't be available.” A widespread Xbox Live outage means there are thousands of gamers with questions and time on their hands. Many have them quickly took to social media to share memes while looking for answers. Although they’re all in the same boat as they wait for Microsoft to chime in with good news, many are just happy to see they aren’t the only ones faced with gaming downtime. me checking twitter to make sure Xbox live is down for others as well, and it's not just me pic.twitter.com/aqfbXn4KX0 — 𝕏epyal 🇨🇾🇬🇷 (@xepyal) July 2, 2024 Everyone rushing to Twitter/X to see if Xbox Live is down. pic.twitter.com/w2sBW6nRCn — Andrew Stow (@AndrewStow23969) July 2, 2024 My Minecraft Horse waiting for me to return because Xbox Live is down 🥲 @XboxSupport pic.twitter.com/2OLIoq2A1D — Garrett ✨ (@gxrrettmxrtinez) July 2, 2024 We’ll update this story when Microsoft has an update on the status of Xbox Live. In the meantime, you can check out the recently confirmed Xbox Game Pass lineup for July 2024 . You can also see our IGN Live interview with CEO Phil Spencer , where we learned more about the company’s plans for the future. Michael Cripe is a freelance contributor with IGN. He started writing in the industry in 2017 and is best known for his work at outlets such as The Pitch, The Escapist, OnlySP, and Gameranx. Be sure to give him a follow on Twitter @MikeCripe. Game# 33 : Jul 6, 2024In this article. Number Line
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Online-to-offline combined with problem-based learning is an effective teaching modality in the standardized residency training of nephrology
BMC Medical Education volume 24 , Article number: 712 ( 2024 ) Cite this article 65 Accesses Metrics details The online-to-offline (O2O) teaching method is recognized as a new educational model that integrates network learning into offline classroom education, while problem-based learning (PBL) is a teaching modality that guides students to apply acquired theoretical knowledge to solve practical problems. However, implementing O2O combined with PBL has not been extensively explored in nephrology residency training. This study aims to explore the efficacy of O2O combined with PBL in the standardized residency training of nephrology by comparing it with the traditional lecture-based teaching (LBT). Sixty residency trainees who participated in the standardized training of internal medicine in the nephrology department of the Second Affiliated Hospital of Zhejiang University School of Medicine were equally allocated into O2O combined with PBL (O2O/PBL) or the LBT group demographically matched. Examinations of theory, practice skills, clinical thinking and teaching satisfaction surveys were utilized to assess the teaching effects of the two groups. Participants from the O2O/PBL group outperformed those from the LBT group in the examination of theory (81.233 ± 9.156 vs. 75.800 ± 7.009, mean ± SEM), practice skills (104.433 ± 3.569 vs.100.316 ± 4.628, mean ± SEM) and clinical thinking (88.933 ± 4.473 vs. 86.667 ± 3.844, mean ± SEM). There was no significant difference in the teaching satisfaction between the two groups. The current study shows the positive impact of O2O combined with PBL approach on standardized residency training in nephrology without reducing teaching satisfaction. Peer Review reports China has established a system of national standardized medical residency training since 2014, affecting the health of its 1.4 billion people [ 1 ]. The Chinese government stated that by 2020, all new medical graduates must first complete residency training in an accredited program before working as attending physicians [ 2 ]. Residents are required to finish 33 months of training in different departments within internal medicine in order to complete their training. Moreover, 2 months are arranged for the nephrology department rotations according to the new standards for the internal medicine curriculum [ 1 ]. However, nephrology training has been facing a challenging phase, with difficulty in attracting prospective residents. Factors such as lower income, greater complexity compared to other specialties, and relatively limited job opportunities in some parts of the country may all be significant contributing factors. Therefore, improving teaching methods could potentially render nephrology easier to understand and could hopefully enhance recruitment to the field [ 3 ]. Thus, it is very important to develop new teaching methods to improve the teaching efficiency of nephrology in the standardized residency training. The advent of the COVID-19 pandemic has necessitated a transition from the offline face-to-face teaching model to the online model as a measure to mitigate the congregation and subsequent transmission of the virus. Due to its efficiency and immediacy, online live teaching is highly regarded by a substantial number of educators [ 4 ]. Ding Talk serves as critical software extensively utilized for office work and online teaching, particularly during the COVID-19 pandemic in China [ 5 ]. The online-to-offline (O2O) teaching method is emerging as an innovative educational model that integrates network learning into offline classroom education in the post-epidemic era [ 6 ], which has been applied to advanced mathematics education and yields exceptional outcomes [ 4 ]. Problem-based learning (PBL) is recognized as an effective, active learning strategy that offers various benefits to students [ 7 , 8 ]. It is characterized as an innovative teaching method that is problem-based, student-centered, and teacher-guided, which directs students to apply their acquired theoretical knowledge to resolve practical challenges [ 9 , 10 , 11 , 12 , 13 , 14 ]. This approach has been successfully implemented in both the standardization training for ultrasonography residents as well as in undergraduate medical education [ 15 , 16 ]. However, the integration of online-to-offline combined with problem-based learning has not been well explored in the education of nephrology in the standardized residency training. Thus, the aim of this study is to explore the effect of O2O combined with the PBL teaching method in the standardized residency training of nephrology. ParticipantsA total of 60 internal medicine trainees, ranging in age from 23 to 30 years, were voluntarily enrolled from the nephrology department of the Second Affiliated Hospital of Zhejiang University School of Medicine. These trainees underwent a standardized internal medicine training program in the nephrology department, which spanned from August 1, 2022, to April 30, 2023. Study designFollowing informed consent, participants were divided into two distinct groups: the traditional lecture-based teaching (LBT) group and the O2O combined with PBL (O2O/PBL) teaching group. The LBT group comprised 30 trainees, including 10 males and 20 females. And the O2O/PBL group comprised 30 trainees, including 8 males and 22 females (Table 1 ). The training instructors of the two groups are all attending nephrologists who have worked for at least 3 years in the nephrology department of the Second Affiliated Hospital of Zhejiang University School of Medicine. And they are regularly trained by educators who are proficient in O2O/PBL and the LBT teaching methods and have passed regular assessments according to the new standards for residency training of internal medicine. Both groups of residency trainees participated in the teaching activities of the nephrology department, such as residency training lectures, case discussions, and teaching rounds. The teaching content was formulated according to the residency training teaching syllabus in China. The study was carried out following the flowchart as demonstrated in Fig. 1 . Schematic demonstration of the process of teaching activities. In the traditional LBT model, residency trainees were exposed to new materials in class through lecture delivered by the instructor in the classroom. While residency trainees in O2O/PBL model were exposed to the material prior to class and involved in problem-based learning mode with study groups during the class via face-to-face teaching by Ding Talk broadcast. Live playback of the classes was available after class for repeated viewing to reinforce learning outcomes. O2O/PBL: Online-to-offline combined with problem-based learning; LBT: lecture-based teaching The teaching process of O2O/PBL group involved the following: Uploading pre-class materials: including online teaching materials such as operation and theoretical courses, putting forward specific clinical problems, and guiding trainees to self-study before class. The theoretical courses referred to the related cases and summary of knowledge points of the classes in the format of slideshows. Each trainee was expected to take about 30 min to preview these materials, and the amount of online work was comparable to the time needed to review course material with the LBT group. The operation courses referred to the practice skills videos and instructions on how to perform urinary catheterization and physical checkups in nephrology. While for the LBT group, urinary catheterization was taught by bedside demonstration. They were also encouraged to self-study before the class and practice after class but with no problem-based discussion and teaching videos. In the LBT group there were no additional learning materials before the class. During the course, trainees were divided into study groups by the instructor, each consisting of 2 to 3 trainees. They discussed the problems raised before the class, shared their own opinions, and the teacher gave feedback and summarized the questions. In each class, smart electronic screens were employed as teaching media in the classroom, and Ding Talk live broadcast started during offline classroom teaching. After the course, playback of the live broadcast of the classes was available for repeated watching to reinforce learning outcomes. The teaching process of the LBT group was as follows: trainees were encouraged to preview relevant textbooks, guidebooks and references before class, and the instructors carried out traditional classroom teaching according to the teaching syllabus. The knowledge points covered in the LBT group addressed the same teaching content as those covered in the O2O/PBL group. Furthermore, the stated learning objective for the LBT group was identical to that of the O2O/PBL group. Finally, the instructors were led to summarize and answer questions. During the class, there were no Ding Talk live broadcasts. The students were allowed to ask questions during the lectures, but no problems were proposed during the LBT classes. Both groups of trainees participated in ward work normally, including receiving inpatients, completing physical examinations, writing medical records, and observing clinical operations according to the outline of the standardized training of internal medicine. Assessment systemAfter the rotation of the nephrology department, trainees of both groups participated in examinations, which included theoretical knowledge, practical skills and clinical thinking, according to the outline of residency training of nephrology. The examination results were employed as objective evaluation indicators. The full score of the theory and clinical thinking examination is 100 points, while the practical skills exam has a full score of 110 points. The theoretical examinations were formulated by the residency training secretary of the nephrology department and underwent a rigorous review by internal medicine educators (Additional file 1 ). The practical skills examination focused on the proficiency in urinary catheterization. During the clinical thinking examination, trainees were tasked with randomly selected case studies which they analyzed to summarize their medical histories, to give diagnosis, and the differential diagnosis, as well as to propose treatment strategies and interventions. An examiner will score the candidates’ professional knowledge, humanistic, professional quality, and communication ability. The entire examination process was supervised by the residency training secretary of the nephrology department and the supervisory committee of the medical residency training program, ensuring adherence to the established standards [ 2 , 17 ]. All residency trainees who participated in the study were invited to complete an anonymous survey online (Additional file 2 ) [ 18 ]. The trainees from both the traditional LBT group and O2O/PBL group were respectively assessed via questionnaires to evaluate their subjective perceptions of different teaching methods. The questionnaire covered five aspects: overall teaching satisfaction, learning difficulty, learning interest, classroom atmosphere and knowledge points consolidation. The questionnaire was assessed using a five-point scale, where a score of 1 indicated “very satisfied” and a score of 5 denoted “very dissatisfied”, with intermediate values representing “relatively satisfied”, “generally satisfied”, and “not very satisfied” [ 19 , 20 ]. Data evaluation and statistical analysisSPSS 22.0 was utilized for statistical analysis of the theoretical scores, practical skills scores, clinical thinking scores, and teaching satisfaction survey items. All measurement data were represented by (mean ± standard deviation). Normal tests were conducted on the data, and the test scores were in line with the normal distribution, whereas the teaching satisfaction survey items were not in line with the normal distribution. An independent sample t-test [ 21 ] was applied for test scores and a chi-square test was utilized for comparison of teaching satisfaction between the two groups. P < 0.05 was considered as statistically significant, P >0.05 was considered as not significant. All analytical methods were conducted in accordance with relevant guidelines and regulations. Comparative analysis of the test scoreThe theoretical score of O2O/PBL group was 81.233 ± 9.156, and that of the LBT group was 75.800 ± 7.009. The practical skills score of O2O/PBL group was 104.433 ± 3.569, and that of the LBT group was 100.316 ± 4.628. The clinical thinking score of the O2O/PBL group was 88.933 ± 4.473, and that of the LBT group was 86.667 ± 3.844. The differences were all statistically significant ( P < 0.05), as shown in Table 2 . We also performed an ANOVA test and obtained similar results to the independent sample t-test for the three test scores between the two groups (Additional file 3 ). Comparative analysis of questionnaire resultsIn this study, a total of 60 questionnaires were distributed and all 60 were received. The questionnaire survey revealed that in the O2O/PBL group, 17 people were very satisfied, 11 people were relatively satisfied, 2 people were generally satisfied, and the satisfaction rate was 93.33%; in the LBT group, 17 people were very satisfied, 11 people were relatively satisfied, 2 people were generally satisfied, and the overall satisfaction rate was 93.33%. Teaching satisfaction survey showed no statistical difference in overall teaching satisfaction, learning difficulty, learning interest, classroom atmosphere, and knowledge points consolidation, as shown in Fig. 2 ( P > 0.05). Comparison of teaching satisfaction evaluation. A Chi-square test was employed for comparison between groups, P >0.05 was considered as not significant. NS: not significant In the post-epidemic era, the single online or offline teaching method cannot meet the needs of medical education. The teaching platform is very important for developing online teaching activities as it serves as a bridge connecting teachers and students while carrying various teaching resources [ 6 , 22 ]. A smart screen with access online was provided by the Second Affiliated Hospital of Zhejiang University School of Medicine for teaching, meeting, and remote consultation. Ding Talk and smart screens make it convenient to start a live stream while conducting face-to-face teaching in the classroom. Live playback of the classes was available after class for repeated viewing to reinforce learning outcomes. Nephrology is a comprehensive and highly practical discipline which is an important part of standardized residency training in internal medicine. Nephrology education is a demanding, complex and often frustrating task. Therefore, the implementation of innovative teaching methods is crucial for enhancing teaching quality and strengthening students’ learning initiative and enthusiasm [ 21 , 23 , 24 , 25 , 26 ]. The O2O teaching method refers to an innovative teaching method that integrates online with offline teaching, which both have the advantage of the ease and efficiency of online education and the environmental experience of offline education. It has been proven that the O2O teaching method has relatively powerful and outstanding practical and social characteristics [ 27 , 28 ]. PBL teaching method is student-centered, combined with specific cases [ 10 ]. It also stimulates students’ subjective initiative in learning through pre-class learning, in class group discussion, and self-study after class. The PBL approach has gained substantial traction in the realm of clinical education due to its effectiveness in enhancing clinical thinking and practical skills [ 29 , 30 ]. Based on these theories and experiences, we combined O2O and PBL teaching methods into the residency training of internal medicine of nephrology, utilizing smart electronic screen as the teaching medium, distributing pre-class and after-class learning materials through Ding Talk network platform, assigning pre-class and after-class homework, initiating Ding Talk live broadcast during face-to-face teaching session, and facilitating students’ discussions on clinical problems raised by instructors in study groups. The teacher summarized the questions, gave feedback and answered questions raised by the students. Finally, a statistical analysis was conducted on the students’ theoretical scores, practical skills scores, and clinical thinking assessment scores (Fig. 1 ). We found that the test scores of the O2O combined PBL teaching group were higher than those of the traditional teaching group, and the difference was statistically significant (Table 2 ). Furthermore, the teaching satisfaction of two groups of students was investigated. There was no statistically significant difference between the two groups, and the complaint rate did not increase (Fig. 2 ). These findings suggest that the O2O combined PBL teaching method was more effective than the traditional lecture-based teaching because it can significantly improve the learning effect of residency trainees without reducing teaching satisfaction. This study showed that the O2O combined PBL teaching method is promising and could be promoted in the standardized residency training of nephrology. There are two limitations to our study. One is that we conducted the study only in our institution with a relatively small number of learners. Another limitation is that we assessed only the short-term results of this teaching approach via test scores. But our research provides a foundation for the O2O combined PBL teaching method to be conducted as an effective teaching method and applied in other institutions with more learners. Further studies are needed to investigate the long-term benefits of this teaching approach for internal medicine training in nephrology such as educational policy making and even career development in China and other countries in the future. In summary, by comparing the learning effect of O2O/PBL and LBT in residency training of nephrology, we believe that O2O/PBL teaching method can provide a better teaching method for residency training of nephrology, which can fully mobilize students’ learning initiative and achieve better learning results. Data availabilityThe related materials including teaching materials, examination materials, and teaching satisfaction surveys were kept in hard copies in the nephrology department of the Second Affiliated Hospital of Zhejiang University, School of Medicine. The original datasets of the study are available from the corresponding author on reasonable request. AbbreviationsOnline-to-offline combined with problem-based learning lecture-based teaching Lio J, Ye Y, Dong H, Reddy S, McConville J, Sherer R. Standardized residency training in China: the new internal medicine curriculum. Perspect Med Educ. 2018;7(1):50–3. Article Google Scholar Lio J, Dong H, Ye Y, Cooper B, Reddy S, Sherer R. Standardized residency programs in China: perspectives on training quality. Int J Med Educ. 2016;7:220–1. Calderon KR, Vij RS, Mattana J, Jhaveri KD. Innovative teaching tools in nephrology. Kidney Int. 2011;79(8):797–9. Peng W, Wang S. 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Download references AcknowledgementsNot applicable. This research is funded by the Second Affiliated Hospital, Zhejiang University School of Medicine under grants no.20220234 and no.20220222. Author informationAuthors and affiliations. Department of Nephrology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, PR, China Junxia Wu, You Ke, Zhida Chen, Lina Zhu & Kunling Ma School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China Mhd Alaa Alhendi You can also search for this author in PubMed Google Scholar ContributionsJunxia Wu participated in the teaching activities, collected the data, analyzed the results and drafted the manuscript; You Ke, Zhida Chen and Lina Zhu participated in the teaching activities, Mhd Alaa Alhendi revised the manuscript and Kunling Ma designed the study. All authors contributed to the critical revision of the paper and approved the final manuscript for publication. Corresponding authorCorrespondence to Kunling Ma . Ethics declarationsEthics approval and consent to participate. This study was waived for ethics approval by the Institutional Review Board and Ethics Committee of the Second Affiliated Hospital of Zhejiang University School of Medicine(research no:2023 − 0989). Informed consent was obtained from all resident participants in the study. Consent for publicationCompeting interests. The authors declare no competing interests. Additional informationPublisher’s note. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. Electronic supplementary materialBelow is the link to the electronic supplementary material. Supplementary Material 1Supplementary material 2, supplementary material 3, rights and permissions. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ . The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/ ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. Reprints and permissions About this articleCite this article. Wu, J., Ke, Y., Chen, Z. et al. Online-to-offline combined with problem-based learning is an effective teaching modality in the standardized residency training of nephrology. BMC Med Educ 24 , 712 (2024). https://doi.org/10.1186/s12909-024-05675-w Download citation Received : 11 November 2023 Accepted : 19 June 2024 Published : 02 July 2024 DOI : https://doi.org/10.1186/s12909-024-05675-w Share this articleAnyone you share the following link with will be able to read this content: Sorry, a shareable link is not currently available for this article. Provided by the Springer Nature SharedIt content-sharing initiative
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