What you'll need:
2 pieces of poster board
Dry erase crayon
1. Lay out squares on poster board. Make sure you have a few extra for new students.
2. Glue on posters and glue posters together.
4. Write each students' name using dry erase crayon.
After each lesson, ask students to answer a question on a post-it. As students leave ask them to stick their post-it on their square.