Evolution of Addition Strategies in Children With and Without Mental Retardation

An Investigation of Practice Effects in a Simple Addition Task: Manipulatives And Strategy Use

A Microgenetic Study of the Effects of Manipulatives on the Early Addition Strategies of Young Children

Manipulatives Influence Accuracy But Not Strategy Use in Kindergartners Solving Addition Problems

Addition Strategies in Kindergarten Children

Strategy Discovery in Kindergartners Solving Addition Problems

How Do Kindergartners Solve Addition Problems and Are They Accurate?

What Role Do Manipulatives Play in Kindergartners' Accuracy and Strategy Use When Solving Simple Addition Problems?