Thomas Castillo

Introduction Do your students or children have difficulty adding or subtracting with positive and/or negative whole numbers? Do they need more practice? Number Chart Wars is a set of game boards that use the basic number chart to help teach addition and subtraction in a simple, visual, and fun way. The first two game boards use positive whole numbers while the last two game boards use both positive and negative whole numbers. Skills Some skills that can be developed using these charts include