This paper reports on a controlled experiment on the effects of three types of reflection triggers in an online course. Fifty-four volunteers, distributed in five groups, used these structured opportunities for reflection during learning. Results show that reflection triggers were extensively employed by the test persons and were perceived as…

Examines backward chaining, a method of producing demonstration films in which sequential steps in a procedure are taught backwards; that is, the last step is taught first, then the next to the last step, and so on. A film designed to teach procedures used in a science experiment is used as an example. (JJD)

Describes an audiovisual teaching unit on the chemical laboratory technique of recrystallization which was developed along problem-solving lines and based on observation of student laboratory behavior. Discussion includes usual procedures for developing such units, how this unit solves problems typically associated with teaching, and its general…