Abstract
This study* Sought to determine whether varying the per cent of class time spent on developmental activities and on practice work affects achievement as measured by a three-part arithmetic achievement test. It considered the effects on achievement in Understanding Arithmetic, Using Arithmetic Accurately, Solving Problems, and Total Achievement. Also, the effects on the upper, middle, and lower ability groups were compared to determine whether these groups were affected differently by this variation in the use of class time.
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