For two summers, week-long residential mathematics programs were held for high school women, with the primary goal of encouraging them to continue their study of mathematics. The activities were designed to rekindle their excitement about mathematics and to support the idea that women should learn advanced mathematics. This paper reports the findings of the data collected to assess the programs. Statistically significant changes were found in student attitudes, confidence level, willingness to continue working on a problem, and perception of the value of group work. Journal entries confirmed the statistical analysis. Follow-up surveys also indicated that the summer programs changed the way the participants perceived mathematics and mathematics courses.