This activity includes 5 prefix cards and 5 base word cards for students to cut out and manipulate on a "Prefix + Base Word = Word Meaning" template mat. It includes instructions for how to do the activity, and an assessment for after the activity. I used it for my formal observation. The students were successfully able to determine the meaning of words with prefixes after this lesson. The prefix posters I used for this lesson are a "Freebie" on my TpT page.