The Chicago Mastery Learning Reading Program (CMLRP) discussed in this report is a method of instruction based on the mastery learning model developed by University of Chicago professor Benjamin Bloom. The report describes the procedures and results of an evaluation of the program's effects on reading achievement, information related to the teaching of reading and the program's implementation, and the perceptions of teachers and instruction assistants about the program. Following a summary of the evaluation project, the report is divided into the following sections: a description of the CMLRP, the evaluation procedures, and the results in each of the three areas mentioned. Appendixes include comments on the program by teachers and assistants and a list of CMLRP and non-CMLRP schools with programs that might affect reading achievement at each school. (HTH)