Number Sense has six modules. Numbers Part 1 uses number manipulatives to give the student an intuitive understanding of composing and decomposing numbers. Numbers Part 2 introduces place value. Easy Add & Subtract uses the abacus to teach not only number sense but also adding and subtracting. By the time a student finishes the fifth module and completely masters the abacus, the student will have a deep intuitive sense of numbers.

Each of the manipulatives is designed to not only see how numbers are composed and decomposed but actually get the "feel" of the number by moving each of the number's components. Though the touch manipulatives are a form of direct instruction, students become so engaged that teachers "have to pry their fingers off their tablets!"