Patterns of attrition from teaching depend on a number of social changes outside of, as well as within, education. Changes in women's reproductive and work lives and changes in the general supply and demand for college-educated workers have affected teacher attrition. Surveys conducted between 1965 and 1970 provided data which were analyzed with particular emphasis on differences between men and women and between elementary and secondary teachers. A review of previous studies estimating rates of teacher attrition is presented, and national rates of teacher mobility and attrition from 1965 to 1970 are examined. Consideration is given to the impact of recent social and demographic trends and to their implications for current and future rates of attrition and mobility among teachers. It is concluded that, while the labor market for teaching is depressed because of enrollment declines, there are also few opportunities available outside of education. Tables present information on: (1) distribution of activity of teachers (by gender); (2) distribution by type of teacher; (3) distribution by level; (4) distribution by gender and age; (5) childbearing patterns of female teachers; (6) occupational change by gender and occuption; and (7) percentage distribution of 1970 occupations of persons who left teaching between 1965 and 1970, and who were employed in 1970, by gender. (JD)