Use these plastic base ten manipulatives to engage students in concrete demonstrations of place value and base ten concepts. This complete set is sufficient to supply a class of 20–25 students. Durable plastic creates a long-lasting learning tool that helps students understand math concepts in a physical way. Designed with the entire class in mind with 600 individual units 200 rods 20 flats three cubes a 112-page Base Ten Revised Book (LER 4296) Teaching Notes and box for organized storage. Blue. Games/Manipulatives Type: Math Manipulative; Age Recommendation: Grade 1+.