This bulletin presents reading research studies in the upper elementary grades during the period from 1955 through 1960. It represents an attempt to bring together the unpublished as well as published studies for that period. This compilation was undertaken by the U.S. Office of Education in response to requests from reading and language arts specialists, particularly members of the National Conference on Research in English. To identify studies for inclusion, the Office of Education sent inquiries and requests to colleges and universities, chief State school officers, local school systems, and others. The 238 studies annotated in this bulletin are grouped under 29 categories, all of which are classified under five broad headings: (1) Causative factors and testing--readiness, individual differences, intelligence, bilingualism, vision and hearing, testing, diagnosis, and other factors; (2) psychological factors--motivation, interests, pupil attitudes, and personal adjustment; (3) reading skills--listening skills, comprehension, oral reading, word recognition and analysis, phonics, library usage and study skills, and vocabulary; (4) educational media--mechanical devices, television, materials, and readability; and (5) educational practices--grouping, individualized reading, comparative studies, subject fields, spelling, and teacher preparation. [Best copy available has been provided.]