32 Weeks (3 Levels for each) Level 1 (all four operations - addition and subtraction to the thousands; one digit multiplication until the thousands; one digit division dividends until thousands). Level 2 (all four operations - addition and subtraction to the hundred thousands; one and two digit multiplication until the thousands; one digit division dividends until thousands). Level 3 (all four operations, include two and three digit multiplication and division, fractions, decimals, equations, ne