Individual student files that may contain hearing and physical examination reports, interview notes, psychological reports, academic progress sheets, photographs, public school records, and correspondence with parents, school districts, and county and state welfare bodies. Before the 1950s, the files are quite thin; many contain only the hearing examination reports. Beginning with the 1950s, the files increase in size and each may contain most of the materials listed above. A supplementary set of 2002 and 2003 graduate files follows the main body of records.