Talking with students I have discovered:
1. The task list that used to appear on the right is no longer there. Students are missing assignments and due dates because teachers and students were conditioned to see these tasks and complete work. Teachers are not alerting students of tasks because they are unaware the list is missing.
2. We also noticed the new buttons at the bottom--of a class of juniors and seniors preparing to be teachers only a third noticed the buttons at the bottom. These contain useful information, such as the list mentioned above, however students are missing them because they have used Schoology for 4 years without them.
3. The course updates should be the default screen in each course rather than materials. Students admit they never click any of the tabs at the side but the updates is an opportunity for teachers to post messages for students outside of class time.