Initial efforts to collect data on the impact of Elementary Secondary Education Act Title I programs began in Pennsylvania in 1972. Due to the frequent turnover of local education agency (LEA) staff responsible for Title I impact reports and the fact that a study of the accuracy of reported scores revealed that some sort of errors appeared in almost nine out of ten school districts, it was decided that a quality control effort would be attempted within the Pennsylvania Department of Education. Consequently, the Title I Data Analysis system was designed and consisted of the following five steps: (1) preliminary data check and addition of district and building ID numbers, and keypunching; (2) data check of all fields punched; (3) check of raw score to percentile score conversions; (4) calculation of gain scores; and (5) report production. Each of the steps is described in some detail. In addition, appendices contain the data collection form and support materials; field specifications for Title I project impact data; a list of tests and years for which norms tables are available; and sample LEA report forms and glossary. (RL)