Use these Plastic Base Ten manipulatives to engage students in concrete demonstrations of place value and base ten concepts. Units are made of durable, washable plastic for years of hands-on activities. Great for helping students understand abstract base ten concepts, including place value, estimation, operations, and more. For use with 20—25 students. Includes: 600 Individual units, 200 Rods, 20 Flats, 3 Cubes, Ten Activity Book, Teaching Notes, and Box for organized storage. Grades 1+ Common Core State Standards Alignment