This study involved secondary teachers in the evaluation, modification, and use of a program built and experimentally tested in elementary schools. Program reactions were gathered from teachers who would eventually use the program, and evaluations were also obtained from instructors outside the experiment. Evaluations from both groups were…

The development and field testing of two instructional mathematics programs are discussed. The general instructional program evolved from earlier research, and was field tested with 40 teachers and over 1000 fourth-grade students. Data reflected that this program had strong, positive effects on students' achievement. The second program focused on…