Sometimes. Each day starts with PBL (problem based learning), which has us split into groups of 8. Each group has their own classroom and facilitator assigned. You'll either be working through a case together, teaching the group an assigned topic, or listening to your other group members. Individual studying during this time would be obvious and likely called out. We receive evaluations based on our performance in PBL which eventually helps determine our grade for this portion. The other part of the day is either TBL (team based learning), peer teaching (practice clicker questions graded on number correct not participation), or patient panels. For these, we are all in a big classroom, but we do have assigned tables for TBL. A lot of people work on random stuff during TBL (or outright skip the class), but some focus is usually necessary. We work through cases and have table discussions, and random tables get called on to answer. Because peer teaching is graded on accuracy, electronics and notes are not allowed out so it is not really possible to study during this time. For patient panels, we're just listening to the patients, so you don't necessarily need to focus 100%, but it's rude to be on computers during this time. As of now, we use clickers for attendance before each session (so in theory you could skip certain sessions), but I wouldn't doubt it if they change how attendance is taken (they already have once this year), so I can't say for certain.