The 35 cumulative units in these 2 books (Part A & B) cover basic computation skills, Roman numerals, presented in language that students understand and use every day. Directions are simple enough to allow students to be self-sufficient much of the time. Theory and generalizations are minimized; practice and application are stressed. Each of the one-week units covers a specific skill or body of information. The Resource Manual A & B provide answer keys for the respective workbooks. The Complete Set includes: Workbooks A & B and Resource Manuals A &B (the answer keys). Components may be purchased separately.