The Addition Review lesson plan is a great way to help students fluently add within 100. This lesson plan focuses on place value and the commutative property of addition, which are both essential concepts for students to master. With this lesson plan, students will be able to work with two-digit numbers that have a sum over 100. Additionally, they can use a 3 by 3 board with problems to play tic-tac-toe. This is a great way for students to get extra practice with addition while also having fun.