SPEECH SPIES! Your mission, should you choose to accept it, is to produce /r/ in all positions of words with at least 80% accuracy.
This is a fun theme that lends itself very well to monitoring speech and language goals in a very fun and motivating way. Each "mission," or IEP goal, can be assessed at the end of each progress monitoring period. The mission can either be extended, to keep working on the goal, or a new mission can be issued for the next period of time.
For my students, we created the missions together, and placed them in an envelope and then placed in a folder. The missions were opened at the end of the quarter, and progress was then assessed.