The Biological Sciences Curriculum Study (BSCS) Human Sciences Project developed, produced, and field tested 13 interdisciplinary, non-traditional, non-text science curriculum modules for early adolescents, ages 11 to 14. A codebook (ED 211 382) contains the frequencies for the value of 23 variables for each of the 3,173 student-activity evaluation interactions (cases) for the activities in the KNOWING module, which was field tested (Spring 1977) with different schools and teachers than those participating in the field test of other modules. This user's guide documents the code book for the data tape KNOWACT, a tape containing 15 variables of student ratings of the 43 student activities in the KNOWING module. A list of variable names and labels with associated page numbers for the data file is provided. (Author/JN)