Increase student vocabulary with 81 words on Montessori inspired three part definition cards. This set includes prefixes bi, tri, quad, hexa, penta, oct, mid, therm, and poly. Each prefix includes 9 words. These are especially helpful in a tutoring, small group setting, or for self-paced motivated students. Definition Cards Set 5 Prefixes non, ex, im, in, ir, mis, over, pro, re, un Definition Cards Set 2 Prefixes anti, auto, bio, geo, inter, macro, micro, photo, teleFree Sampler Prefix Wheel Set