Addition Strip Board

Using the Addition Strip Board. the child practices the sequence of addition combinations 1-9. and begins the process of memorization of the addition tables.
The material is composed of a hardboard chart 12 squares by 18 squares with the numbers 1-18 printed across the top. Stored in a wooden box withh lid are the strips used for the exercise. 9 red strips divided into squares and 9 solid blue strips. both printed with the numerals 1-9.