Designed to strengthen the teaching of mathematics in the elementary grades, this book focuses on helping teachers engage in instruction based on learning trajectories (LTs). The authors bring together the experiences and key research-based findings of four different groups of teacher educators that created effective professional development…

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…

Presented are new principles and methods in the instruction of mathematics, with the primary focus at the elementary school level. The first half has the following sections: (1) The Influence of Environment on Child Behavior; (2) Pre-Mathematics; (3) The General and the Abstract; (4) The Passage from Pre-Math to Mathematics; (5) Building a…

In 1973, the Education Development Center (EDC) received a grant for the production and support of 65 half-hour television programs. Aimed primarily at eight- to eleven-year-old minority children, the programs were to teach supplementary mathematical topics through real situations, drawing examples from science, technology, and the arts. Hands-on…

Reports development and results of the Kramer Project, a two-year study of the implementation of a problem-solving, activity-based mathematics program in the elementary grades. Describes the mathematical content covered, participating teachers, instructional materials employed, inservice teacher training provided, and academic achievement gains of…