This is an excellent way to get your students to utilize the 100's chart and count with accuracy and fluently. Students will have fun filling in the numbers and using the extension to challenge a friend. I created this to help my group of struggling students during small group to my surprise they loved it and wanted more. So I thought I would share this with you all. I hope you find it helpful and thanks for stopping by my store. Have a blessed year. Please don't be fooled by the preview when you hoover over it. That is not the way it looks when you print it out.