Base Ten Blocks (LER 0930) in a handy, smaller set! Perfect for small group or individual classroom instruction, this Smart Pack supports the Standards for Mathematical Practice according to the Common Core. The set of 121 pieces (1 flat, 20 rods, and 100 units) comes in a resealable polybag and includes an activity guide. Grades 1+, Ages 6+. Size: 15.2 x 12.7 x 4.3 cm.