This is a differentiated center. Students can use the 10 more, 10 less, spinner and cards, 100 more 100 less spinner and cards or the 100 more, 100 less, 1 more, 1 less spinner and cards. Each has it's own recording sheet. Students choose a card and write the number on their recording sheet. They then spin the spinner to see if they are adding or subtracting and the number they are adding or subtracting. Finally, they figure out the equations.