In a study to evaluate instructional material as a function of teacher manual format and material complexity, 52 preservice special education teachers, 19 to 24 years of age, positively rated simple material when it was accompanied by an illustrated poorly organized manual. Inclusion of a well organized, illustrated manual eliminated differences as a function of complexity. The findings may reflect inexperience of the subject population in evaluating materials. Experienced teachers might be expected to make more critical judgments according to demands of the teaching situation. (For related materials, please see EC 052 343). (Author/MC)