This 20-minute cassette tape on microteaching is one of a series designed to inspire inspire inservice school personnel and provide them with basic information about school innovation. Allen describes microteaching as a scaled-down and constructed, yet real, teaching situation in which teachers can sharpen skills (like the use of reinforcement), learn new skills, and experiment with different approaches and materials. Allen cites several advantages of microteaching over regular classroom teaching as a vehicle for experimentation: teachers can make mistakes without jeopardizing their pupils' learning; they can put successful new approaches into practice the same year they discover them; and--if the microteaching sessions are videotaped--they can evaluate themselves and reteach lessons. (LP)