Exploration and practice of blended teaching of cell biology experiments during the COVID-19 epidemic

Since 2019, new coronavirus pneumonia has been widespread worldwide and has had a direct impact on human life. Meanwhile, it also has a huge impact on teaching in universities and hospitals, especially in experimental courses. Cell biology is not only an important part of biology but also one of the most dynamic frontier branches of modern life science, which is also a science based on experiments. It is necessary to promote the online and offline teaching during this special period. To explore and evaluate the blended teaching modes during the COVID-19 epidemic, we changed the previous single teaching mode of "teaching + experiment" and published courseware and learning requirements online before class, this kind of mode takes "theory + virtual demonstration experiment" in class as the main body and the reviewing and thinking after class as the summary. We also carried out offline practice on a small scale when the epidemic allowed and actively explored the comprehensive online and offline teaching modes, in and out of class. Through the hybrid teaching, the percentage distribution of students in high and moderate scores ranges were greatly increased, the blended teaching mode also greatly improves students' subjective initiative and highlights the development of students' personalized thinking and scientific research ability. The practice of this model not only ensures the health of teachers and students during the epidemic but also provides a new teaching exploration model and thinking for the development of experimental courses during the epidemic.