This set of matching cards is for numbers 1 through 20. You will find much flexibility with the six variations. These cards allow you to work on Counting, Number Recognition, Place Value, More/Less, Teen Numbers, Ten Frames, Adding One More, and 1 More/1 Less. You can pull two variations at a time for students to match or for an extra challenge use three! These cards may be of use to you for the duration of the year. Toward the beginning, you may focus on numbers 1-10 and further in the year extend out to 20. You may begin with number recognition and counting objects and end with addition or place value! I hope you will find these matching cards useful in your classroom, thank you for your purchase!