Prepare a costume box for your classroom. Start with a trunk or large cardboard box and fill it with clothes, hats, shoes and accessories that students can use to make a wide variety of costumes for their skits. Check thrift stores and garage sales for inexpensive costume box additions, or send a letter to parents asking for donations.
Divide students into groups and assign each person in each group a job. One student can be in charge of writing the skit. Assign a casting person, a director, a costume designer and a set person. If the groups are big enough, assign additional students as actors. Otherwise, the group members can do double duty.
Provide students with a list of topics to design and perform a skit about. Topic ideas may come from recent or current studies, classroom problems that need working out or current events.
Use skits to demonstrate an idea or concept your students are having a hard time understanding. This works especially well with students who are not native English speakers, according to The China Teaching Web. A visual demonstration has a significant impact, driving home a point that words alone may not be sufficient for.