Students count on or count back to add or subtract. This strategy can be used to supplement math instruction, to practice addition and subtraction, or for enrichment activities.Students practice addition and subtraction within 20Contains: 164 BOOM CardsClipartKimberly Geswein FontsCreative Clips****Try before you buy by clicking on the Preview Button!!!No-Prep, Digital Task or subtractSelf-CorrectingInteractiveEngagingWorks on Interactive Whiteboards, computers, chromebooks, tablets, and even sm