The Effects of Immediate Achievement and Retention of Middle School Students Involved in a Metric Unit Designed to Promote the Development of Estimating Skills.

Seventh-grade students (n=397) were studied to determine the effect on immediate achievement and retention of a unit designed to promote the development of estimating skills involved in metric measuring. Identical metric instruction was used with the exception of activities in estimation for the treatment group. The treatment group retained significantly more of their skills than the referent group. (PR)