This file includes a poster of a poem to help decide whether you need to regroup. The poem is commonly used, and I was not able to find an author for it. The activity involves shaking dice to create two-digit numbers, using the numbers to create subtraction problems, and sorting the subtraction problems into regrouping, no regrouping, and same-number problems. The recording sheets contain fading prompts, such as lines above the first few subtraction templates when regrouping is needed. The activ