This 73- slide powerpoint can be used either as a teaching tool to reinforce "o to ue" and "e to ie" stem-changing verbs or as a review game. If used as "Board Races",students can write the answer on a smart board, white board, or chalk board. Divide class into 2-3 teams. Two or three students come up to the chalkboard or smart board and you advance the slide. The first student who writes the correct answer gets a point for his or her team. Note: The subsequent slide reveals the answer.