This worksheet contains 6 speaking activities. Each of them is based on excersises that theatre actors use to warm up or rehearse. Some od the activities are already popular with ESL/EFL teachers, while others are pretty new and may come as a surprise to you.
Believe me, they all are a lot of fun. They all are about improvisation. You should probably provide students with enough time to prepare before acting out these activities. The purpose of the activities is fluency practice. Most of them are best suited for higher levels. Try them with your class and let us know how it goes! Good luck!