This demonstration project provides intensive instruction in reading and mathematics to selected fifth graders in the 1974-75 year and for selected fifth and sixth graders in 1975-76 in order to raise the reading and mathematics performance of underachievers to a level commensurate with measured ability. The sharing of learning activities in mathematics, which teachers have found effective for underachievers, is the main purpose of this resource. The document supports the theory that a sound curriculum in mathematics for elementary schools is characterized by both mathematical content and an approach to teaching consistent with the best available knowledge of learning in children. Its main focus is on activities used in teaching children about operations on whole and fractional numbers. The learning activities included give instructional suggestions for each of the 35 minimal objectives specified for the program. The importance of the teacher's recognition of four types of errors is emphasized for eventual diagnosis and remediation of failure. Brief guidelines for both diagnosis and remediation are provided. Also offered are some suggested methods of motivating low-achieving pupils; namely, extrinsic and intrinsic motivators. The importance of record keeping in individualized instruction is also stressed and forms included here facilitate the individual monitoring of pupil progress. (Author/AM)