This hundreds chart is differentiated to help students who are struggling with going from one row to the next. The chart is expanded into a tree with branches leading from one row to the next (i.e 20 to 21). Students can use the frog to "hop" from one number to the next, and then follow the branches to go down a row for adding, or up a row for subtracting. Once students seem to grasp that concept, they can move to the standard hundreds chart with the same color patterns as the expanded one. Attached are all the parts you need to make the expanded hundreds chart, including the frog.