This curriculum is designed primarily for individualized classrooms where the teacher is working with an assistant, but has also been proven effective in traditional classrooms and in remedial situations. It is designed to test and teach children the basic abilities (readiness skills) assumed by the present primary-grade reading, writing, spelling, and arithmetic programs. Each of the four programs contains a series of behavioral objectives and criterion-referenced tests designed to enable the teacher to determine which perceptual skills a child has already mastered, which skills to teach next, and which skills should ultimately be acquired to insure adequate readiness in a primary-grade instructional program; learning activities coded to the skills they teach; and a guide to managing that program in various learning situations. The history, design, and use of the curriculum, as well as a rationale and validation studies, are discussed in the introduction. A bibliography is included. (LL)