"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 secondary courses, "I CAN Learn® Algebra" and "I CAN Learn® Geometry." The What Works Clearinghouse (WWC) identified one study of "I CAN Learn® Algebra" that both falls within the scope of the Secondary Mathematics topic area and meets WWC group design standards. No studies of "I CAN Learn® Algebra" meet WWC group design standards without reservations, and one study of "I CAN Learn® Algebra" meets WWC group design standards with reservations. This study included 686 students in eighth grade in one school district. The WWC considers the extent of evidence for "I CAN Learn® Algebra" on the mathematics test scores of secondary students to be small for one outcome domain--general mathematics achievement. No studies meet WWC group design standards in the five other domains, so this intervention report does not report on the effectiveness of "I CAN Learn"® for those domains. "I CAN Learn® Algebra" had no discernible effects on general mathematics achievement for secondary students. Appended are: (1) Research details for Kerstyn (2001); (2) Outcome measures for each domain; (3) Findings included in the rating for studies of "I CAN Learn® Algebra" for the mathematics achievement domain; and (4) Description of supplemental findings of "I CAN Learn® Algebra" for the mathematics achievement domain. A glossary of terms is included.