This teacher's guide, with accompanying videotape, presents an episode of the NASA SCI Files. In this episode, one of the tree house detectives has had an accident and cannot get into the tree house. Using problem-based learning, the rest of the gang investigates the world of simple machines and physical science and "pull" together to…

Simulation, including role-playing and role-simulation, as techniques for teaching English as a second language are discussed and illustrated. Introductory sections outline the instructional value of simulations, their motivating function, stages in their production, and their structure. Their production includes these stages: analysis of student…