In an effort to better understand the factors associated with college persistence and attrition, the Survey Research Center at Princeton University, with funding from the Andrew W. Mellon Foundation, is conducting the College Student Attrition Project. As part of that project, Mathematica Policy Research conducted the College Experiences Survey. The sample frame included the undergraduate entering classes of 1999 from the University of Florida at Gainesville, the University of Illinois at Urbana-Champaign, and Stony Brook University, including all those who later graduated, transferred, or dropped out. The data collection used a mixed-mode approach consisting of a web-based questionnaire with telephone followup. This report summarizes the College Experiences Survey data collection procedures and the results that were obtained. Appended are: (1) Detailed Distribution of Sample; (2) Data Collection Materials; (3) College Experiences Survey Annotated; and (4) Data Documentation Memo. (Contains 4 tables and 2 footnotes.)