I made this bulletin board in hopes of helping my closure of lessons. It has done that and more. At the end of lessons, or during independent work time, I tell students to "Tweet me!" Depending on my direction, they can tweet anything from one math problem to a question they still have about the lesson or something they learned and are excited about. They stick their post it note to the board and I can check at a later time (or right then) to see who needs extra help or who still has questions. It is a great informal assessment and helps me to make sure I am checking on all 27 students in the room.
