During the center, I walked around and engaged with each group, beginning with those that I knew might be struggling to read and understand the directions. Then I moved on to the rest of the groups. Once I knew that all students were on the same page, I continued to circle the room throughout the rest of the time to assure that the students were playing fairly and understanding the most important concepts from the game. The goal of this center was to help students strengthen their ability to see a number and immediately know its factors and multiples. The instructions call for one player to choose a number on the board to cover with a counter, and then other partner chooses either a factor or multiple of the previous number to cover with a different color counter. The players switch on and off until the entire board is covered, and then they play again!