Students hang cards on a balancing scale, determining relationships among gallons, quarts, pints, and cups without the mess! Double-sided cards feature volumes on one side and fractions on the other to integrate understanding across modes of numeric representation. Cards are also relational in size and weight, cementing math concepts with tactile and visual feedback. Scale is 18"L x 41/2"W x 13"H. Includes scale, 31 volume/fraction cards, and lesson and activity ideas. Recommended for Elementary and up.