This is a Tic-Tac-Toe review game I created. It is over the layers of the Earth and plate tectonics. The students will walk up to the Smartboard, and will pick a box where they would like to put their X or O, this will then bring them to a question, and they have to correctly answer the question out loud, and then click the question mark in the bottom right corner which will show them the answer. If they are correct they can go back to the game board and put a X or O in their box. This is a great way to review and assess what the students know about plate tectonics and the Earth's layers.