Get your students on the fast track to understanding early mathematical concepts and developing positive attitudes towards mathematics. Learn by doing! Practice finding sums, differences, missing addends, missing subtrahends, and more. Ideal for students in grades K-2, children who learn best by manipulating objects, as well as remedial and special needs learners. Reinforce one-to-one correspondence and perform all number line functions by rolling a ball to a specific location on Number Street with a magnetic wand. Durable plastic construction. No removable parts. Activity guide included. (4 x 15" Durable plastic construction with no removable parts)