The 15 self-contained centers in Math Centers, Grades 4—6 are presented in folders. Nine centers are intended for individual practice; six centers are constructed for pairs of students. The skills practiced include: Individual practice—percentages, equivalent weights, coordinate graphing, measuring angles, geometric shapes, means and median word problems, money word problems, perimeter, positive and negative integers (temperature), understanding math symbols Partner practice--geometric shapes, number order, word problems with time, multiplication (factors and products), decimals, and equivalent fractions