-25
Two instructional programs related to training materials were reported in the research literature. Borg tested the effectiveness of the minicourse (an instructional microteaching package) in changing specific teacher behaviors (10). Twentyminute pre- and postminicourse video-taped recordings of each of forty-eight participating teachers' classroom lessons were made and were scored by trained raters. Results of the analysis of pre- and postminicourse scores showed that teachers made significant gains after the minicourse on ten of twelve behavior scores and demonstrated a reduction to half the precourse level of teacher talk.
Henderson reported a project to test protocol materials
(31). The project consisted of designing, developing, evaluating and field testing ten single concept black and white films (five minutes each) with accompanying guides that taught specific teaching strategies. A Pretest-Posttest Control Design with a variation in treatment was used. Results of the evaluation strongly indicated that students gain both cognitively and affectively through instructional encounters with the protocol materials.
The University of Colorado also evaluated five protocol materials units. "For all five protocol products, it can be said that both the ideas dealt with and the activities used to deal with them were considered worthwhile and significant by both students and instructors" (62:20).