A Cross-Sectional Study of Mathematics Achievement, Estimation Skills, and Academic Self-Perception in Students of Varying Ability.

This study investigated students' mathematics achievement, estimation ability, use of estimation strategies, and academic self-perception with 135 students (n=135) in grades 4, 6, or 8, either with learning disabilities (LD), average achievers, or intellectually gifted. Students with LD differed significantly from average achievers in their use of fewer effective estimation strategies. (Contains references.) (Author/DB)