Rrrrriiiinggg! The bell just rang. Class has started. What now? As a teacher, you know that it can be a bit jolting if you jump right in with a huge dose of academics. Your students learn much better when they start class with something interesting that will get them in the mood to learn. To help, we’ve put together 20 fun bell-ringer activities for all grades and levels that you can do today using your document camera.