Do your students struggle to make gains on the subtraction timed test? Do they resist using the strategies you have taught? This sorting activity reinforces the use of counting up versus counting back to subtract. Use it whole group, individually, in partners, as a center, in intervention or special education situations. Have students focusing on the strategy rather than on the answer, really helps. Both black and white and color sorting mats, as well as fact cards are included. Or use your own set of flash cards to save on prep. The last page includes ideas on what to do next after students get the hang of this sort. Your students will make gains- do not give up!