I created this while teaching fourth grade in response to my students slow computational skills. It all goes back to the students' ability to group numbers into tens. By using this song, I was able to help my students memorize their "tens buddies" and saw improvement in their addition and subtraction! I projected it onto my Smartboard and the kids had a blast with it. It is to the tune of "Twinkle, Twinkle, Little Star" so most students are familiar with the tune. This can be used for younger grades too.