You can teach your students about prefixes by putting a twist on the classic game of Bingo; substituting prefixes for the usual numbers. You will need several large, white posters to make the bingo cards (enough posters to make cards for all of your students). Cut the posters into 6-by-6-inch squares and have your students draw a 5-by-5-inch grid on each card. Have the students randomly fill in the cards with common words that have prefixes, such as "bicycle, undo, repeat, and disagree." To play the game, you create word clues for the students who would have to guess the correct answer. For example, one clue could be "A cycle with two wheels." The students would place a marker on the word "bicycle." The student that fills in a row, column or diagonal wins.
You could also create a game of prefix Jeopardy for your students. For this game, you would split the class into two teams competing against each other to answer prefix-related questions. Draw a replica of the Jeopardy question board on the chalkboard or whiteboard. Your categories would be prefixes, such as "bi-, dis-, and in-." An example question under the "in-" category would be, "This is the opposite of outside." The answer would, of course, be "inside." Each student from each team would take turns facing off against another student answering questions. The team with the most points wins.
Another activity that you can do to teach your class prefixes is a class bulletin board. Allow your students to decorate a bulletin board with prefix-related items. For example, you could split the class into four groups and assign each group a set of prefixes to represent on the board. One group may have the prefixes "out- and ex-." That group would find pictures and words involving those two prefixes. Pictures of the "Great Outdoors," outer space or vanilla extract would be to the point. Each group would submit its pictures and post them onto the board, learning from other students work in the process.
This project is for students to do individually. Have each student create a story to tell using as many prefixes as they can. The students could make up a fantasy story or tell about what they did over the weekend, but the purpose of the story would be to demonstrate knowledge of prefixes. For example, a student could tell a story about how she went outside and sat underneath a tree near an overpass and would continue in that fashion, weaving prefix words into the story.