This is a week long power point lesson teaching the meaning behind subtraction. It is all based on word problems and starts with finding the whole group and sets in the problem. Then it goes on to reading and writing subtraction problems. Finally, it ends with solving word problems and differentiating between subtraction and addition word problems. Each lesson is well defined with a Ticket Out the Door to use as assessment. This is a great lesson to have before my Subtraction Counting Strategies and Subtraction Memorizing Strategies. I also have a Subtraction Pack that includes all three of these power points. This lesson will give your students a great foundation for success in subtraction!