The Math Master practice books allow children to monitor their own progress as they practice using a variety of Montessori math tools to solve addition problems at their own pace. The first page of the book features a visual check list, allowing the child to track which addition materials lessons they have completed. The following 40 pages use a visual cue to recommend a tool to assist the child in adding. Each page features a heading number line with all possible sums (to assist in number forma