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. The Codebook for Human Sciences Activity Characteristics on Reviewer Evaluation File--HSACRE (ED 211 384) contains 8 variables characterizing 623 activities or activity parts used in the field test of the program (1973-1976, 1977) in middle/junior high schools in the United States. The same file also contains 52 variables that present content and public reviewer's ratings of most of the activities. This user's guide presents the conceptual design and descriptions of four activity characteristic codes (major focus of the activity, type of knowledge required to do the activity, descriptive sources of the activity content, and what students were to do as the activity was studied). Variable names, variable labels, and coding format, are provided. (Author/JN)