"I CAN Learn"® is a computer-based math curriculum for students in middle school, high school, and college. It provides math instruction through a series of interactive lessons that students work on individually at their own computers. Students move at their own pace and must demonstrate mastery of each concept before progressing to the next one. Classroom teachers may provide individual, small-group, or whole-class instruction based on students' performance on the software program. This review focuses on studies of "I CAN Learn"®'s primary courses, which include "Fundamentals of Math" and "Pre-Algebra." The What Works Clearinghouse (WWC) identified one study of "I CAN Learn"® that both falls within the scope of the Primary Mathematics topic area and meets WWC group design standards. No studies meet WWC group design standards without reservations, and one study meets WWC group design standards with reservations. This study included 9,886 students in eighth grade in one school district. "I CAN Learn"® had no discernible effects on the mathematics test scores of eighth-grade students in primary mathematics courses. The following are appended: (1) Research details for Kerstyn (2002); (2) Outcome measures for the mathematics achievement domain; (3) Findings included in the rating for the mathematics achievement domain; and (4) Description of supplemental findings for the mathematics achievement domain. A glossary of terms is included.