43 Slide Powerpoint Using Visual Tiles to entail subtraction of integers. Correlates to Math Common Core Standard 7.NS.A.1. Has detailed, timed animations of each step; the initial representation of tiles, tiles filled in as red (negative), and black (positive), tiles added to enable subtraction. A guided practice handout is included in the powerpoint. This lesson is a visual presentation of what is often done with 'counters' in class. The lesson is designed for seventh grade, but can be used in eighth to review and ready students for activities involving integers (such as translations). It is smartboard ready!