The Chicago Public Schools have been developing and implementing a citywide instructional program of continuous progress/mastery learning in reading. It includes the delineation of a K-8 continuum of instructional objectives; a criterion-referenced testing program which serves as the basis for instruction, promotion, and administrative monitoring;…

In the first part of the paper, some realistic expectations about schools and curriculum development, the conditions which preclude applying the standards of basic research to evaluate a program of instruction in large school systems, and some new research paradigms which have emerged from practice are defined. In the second part, an effort is…