This subitizing (subitising) PowerPoint lesson pack is perfect for Kindergarten and Pre K students who are beginning to learn the important mathematical concept of instantly recognizing and discriminating small numbers of objects. Subitizing assists student achievement in counting on, place value, arithmetic, composing and decomposing numbers. What do you get?150 interactive PowerPoint slides that focus on subitizing fluency using ten frames, tally marks, dice, fingers, dominos and collections.