Materials and Technology Printer (preferably color) NIH Imaging Software PC:http://www.scioncorp.com/ MAC:http://rsb.info.nih.gov/nih-image/ Math manipulatives. (plastic links, paper clips -lg/sm., unit blocks, Unifix cubes, ruler, tape measures, string.) Balls. (globe, basketball, volleyball, soccerball, baseball, ping pong ball, golf ball, marble, pea.)