These Addition Problem Slips come in four boxes organized by difficulty or operation type, giving lower elementary children a sustained, independent source of addition practice that extends well beyond what a teacher can write on the board in a day. The slip format is ideal for use with the stamp game, bead frame, or pencil-and-paper work, allowing children to self-select problems and work at their own pace without waiting for teacher-generated equations. Having four boxes ensures a broad enough range of problems that children can return to this work repeatedly across the year without exhausting the material.