Increase student vocabulary with 81 words on printable Montessori 3 part definition cards for home and school. This set includes prefixes ex, im, in, ir, mis, over, pro, re, and un. Each prefix appears in 9 words. These are especially helpful in a tutoring, small group setting, or for self-paced motivated students. Wheel of Prefix Words Set 5 ex, im, in, ir, mis, over, pro, re and un Definition Cards for Set 1 Prefixes bi, tri, quad, penta, hexa, oct, poly, mid, and thermDefinition Cards Set