The pandemic forced biology instructors to move traditionally face to face classes to online or hybrid formats. How students responded to this shift depended highly on their age and personality. My observations of students reactions to this shift in course formats indicated that young undergraduates did best when the course was highly structured, the instructions were clear and consistent, and the material presented in a hybrid format rather than a 100% online format. I share my observations and give examples of student reactions to changing course formats.