In my second grade class we teach larger addition and subtraction through strategies and not through the traditional algorithim style! With that said, my students use a 100 and/or 200's Charts, along with Place Value and Number Line Mats to solve larger addition and subtraction number sentences. In creating math rotations (following the MATH acronym), this poses a challenge for the "Hands-On" rotation, since everything you find has the kiddos using the algorithim and not exactly what I nee