From probability and place value to area and fractions, our comprehensive manipulative library reinforces essential math concepts that support upper-grade curriculums! Each plastic tub includes enough hands-on supplies for the whole class to explore concepts at once, plus a guide filled with skill-building activities. Library includes all 12 tubs shown—organized in an easy-access storage center. Metal storage center measures 26"w x 12 1/2"d x 19 1/2"h. Each tub also available separately below.