This is an easy way for students to keep track of their addition skills dealing with two and three digit numbers. In 2nd grade, students need to know how to add two digit numbers, but often times once they get it, we move them onto three digit numbers for enrichment. This sheet allows students to show their work for each type of problem (regrouping, no regrouping, two digits, or three digits). Students can attach their shown work or complete their work on a separate paper or in their math journals. I've included challenges on the bottom to extend thinking once they've mastered the addition algorithm.