Ohio's Learning, Earning, and Parenting Program (LEAP) provides all teen parents who receive welfare with a substantial financial incentive to attend school. This is the fifth and annual report from a large-scale evaluation of the program, based on a study of 4,151 teenagers who were randomly assigned to either a program group or a control group. Data about both groups were collected during a 4-year followup period. Findings indicate that LEAP succeeded in increasing school enrollment and attendance and in reducing welfare receipt. Moreover, the program was cost-effective for the state welfare department and increased GED receipt and employment among teens who were enrolled in school when they were first found eligible for LEAP. However, LEAP did not increase the rate of high school graduation because many teens dropped out before completing their senior year. There was no increase in school completion or employment for teens who were not in school when they entered the program, despite high sanctioning. One way to make these programs more effective is to better address the specific needs and issues of distinct groups of teen parents, which include resistance to school; the demands of parenthood; and concerns about money, safety, and child care. Fifty-one tables and 17 figures are included. Appendices contain supplementary tables and methodological notes. (LMI)