This study compares synchronous versus asynchronous online teaching in an introductory calculus-based physics class Like many schools, our institution transitioned to online teaching during the COVID-19 pandemic We held optional synchronous online sessions during the original class time, and approximately half of our students were regular attendees In the study, we look at how students' grades changed after the transition While students who attended the synchronous sessions saw an average test grade drop of 3 5%, students who did not attend saw a drop of 14 5% The students who attended also saw a larger gain the standard Force Concept Inventory pre/post assessment: 56% versus 43% We also created a survey to gauge the students' perceptions of the course difficulty and workload The survey showed that students who did not attend the synchronous sessions found the course more difficult and felt they spent more time on the class than those who attended These findings lead to our recommendation that future online offerings should require mandatory synchronous participation © 2020 IOP Publishing Ltd

中文翻译：

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COVID-19 大流行期间同步与异步在线物理教学

本研究比较了基于微积分的入门物理课程中的同步与异步在线教学 与许多学校一样，我们的机构在 COVID-19 大流行期间过渡到在线教学 我们在原始课堂时间举行了可选的同步在线课程，大约一半的学生是常规参加者 在这项研究中，我们研究了过渡后学生的成绩如何变化 参加同步课程的学生平均考试成绩下降了 3 5%，未参加的学生则下降了 14 5% 学生参加过标准力概念量表前/后评估的人也看到了更大的收益：56% 对 43% 我们还创建了一项调查来衡量学生的对课程难度和工作量的看法 调查显示，没有参加同步课程的学生觉得这门课程更难，并且觉得他们在课堂上花的时间比参加课程的学生更多 这些调查结果导致我们建议未来的在线课程应该是强制性的同步参与 © 2020 IOP Publishing Ltd