From measurement and 3-D shapes to fractions and decimals, our comprehensive manipulative library reinforces essential math concepts that support upper-grade curricula! Each 6 1/4" 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 8 tubs shown—organized in an easy-access, 26"w x 8 1/2"d x 13 1/2"h metal storage center. Each tub also available separately.