The purpose of this Florida study was to field test experimental multi-level materials for teaching reading and the subjects that make up the general knowledge area of adult basic education. The pre-publication edition of the experimental material was compared to traditional materials by: (1) differences in gain in reading ability, (2) acceptance by students, (3) by teachers, (4) by teachers in training, and (5) by experts. Two achievement studies were conducted. Experimental mortality in the first study was too great to allow generalizations. The second study found no statistically significant differences in achievement between students using the experimental material and those using traditional materials. Students accepted the experimental material as well as any traditional material (and better than one); teachers accepted it as equal to, or more adequate than, traditional materials; teacher-trainees accepted it more favorably; and 11 experts rated the materials more favorably than any of the traditional materials used for comparison. Findings imply that the published edition of the material would adequately teach reading skills and would be accepted by students, teachers, teacher-trainees, and experts. (Author/NL)