Siegler’s Overlapping Waves model represents the fact that2 a. older children may ebb and flow in their use of higher-level arithmetic strategies. b. arithmetic ability is distributed like wave, and...

older children may ebb and flow in their use of higher-level arithmetic strategies.

arithmetic ability is distributed like wave, and different age groups will have different crests.

different children, each of whom represents a wave, have different but overlapping waves of ability.

more than one strategy is available to solve arithmetic problems, and each strategy is used to a different degree at different points in one’s development.