The purpose of this research is to examine the effects of a computer simulation program on the ability of students with LD to: a) communicate mathematically, b) estimate problem solutions, and c) solve applied story problems. Eight students with LD, ranging from 9 to 11 years of age, took part in the study. The students participated in a computer-presented interactive software program, which used contextualized problem solving to target the above skills. A multiple baseline research design was used to examine: (a) improvement, or lack thereof, of student skills in problem solving, estimation, and math communication abilities, (b) interactions among the three targeted components, (c) generalization of skills to more traditional (e. g., paper and pencil/teacher directed) formats, and (d) extended generalization of acquired skills. Implications of these findings are presented as well. / text