Reports a study of the quality and extent of understanding of certain well-known theoretical concepts which are held by prospective teachers (N=173) of chemistry in Yemen. Results indicate that teacher understanding ranges from a partial understanding with a specific misconception to no understanding. Contains 25 references. (DDR)

Explores the beliefs of inservice teachers about a demonstration classroom component of an in-service program. Results suggest that the demonstration classroom concept is worth further consideration. Contains 57 references. (DDR)