This program requires Adobe Acrobat Reader - which is included in the Utilities folder of this CD-ROM

A remedial, "ground-up" re-teach of addition and subtraction. Addition & subtraction facts are presented in "clusters," including the fact and its complement. Practice problems are controlled, or limited, to the clusters shown on each page, allowing for review of the facts, a prompt for unknown facts, and, most importantly, allowing the student to progress even though facts are not mastered.