This edition of the Biological Sciences Curriculum Study (BSCS) newsletter contains a report of the activities of the curriculum study during 1970-71. Staff changes are noted, current projects summarized, with special reference to the programs for the educable mentally handicapped and to the developing interdisciplinary program for middle school grades that considers the interface between the social sciences and biology in a "human sciences" sequence. Lists of the BSCS materials currently in print and accounts of pending publications, together with the sources of supply, are included. Educational Testing Service data showing the proportion of candidates for the College Board Achievement Test in Biology who had studied each of the BSCS versions in high school from 1964 through 1970 are reported. (AL)