During Fall 1970 the questionnaire for the Winter 1970-1971, or fourth follow-up, of the 1965-1966 current population survey (CPS) of high school seniors was completed by the Columbia researchers and Census Bureau personnel jointly. The field phase of the follow-up was conducted by Census in Winter 1970-1971, followed by data processing by Census. This technical progress report contains more than 90 pages of appendix-material including the following: (1) flow-chart of principal study data sources; (2) findings for the third or Winter 1969-1970 follow-up of the Fall 1965 CPS high school seniors including high school curriculum and academic status, academic aspirations in high school and post-high school eventuations, additional personal, socio-economic and academic variables and academic status, parental academic expectations, post-high school guidance counseling, and eventuations; (3) findings for the 1967-1970 CPS computer tapes including 1960-1970 college entrance rates, duration of college attendance and objective, benefits of attendance, changes in elementary and high school attendance, and progression of children through school; and (4) questionnaires for the third and fourth follow-ups. (Author/RL)