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“I CAN Learn”[R] is a computer software system that provides math instruction through a series of interactive lessons. These lessons are delivered with a one-to-one student-to-computer ratio. Students determine the pace of each lesson and must demonstrate mastery of the lesson before progressing to the next one. Teachers provide individualized instruction to students on the basis of their performance on the lessons. The available “I CAN Learn”[R] curricula include fifth- to sixth-grade math, pre-algebra, algebra, and geometry. These curricula are aligned to the National Council of Teachers of Mathematics standards and can be customized to meet state- or district-specific standards. Studies included in this What Works Clearinghouse (WWC) review assess the effectiveness of the pre-algebra and algebra components of “I CAN Learn”[R]. One study (Barrow, Markman, & Rouse, 2009) is a randomized controlled trial with high levels of attrition that meets WWC evidence standards with reservations. That study is summarized in this report. The remaining 10 studies do not meet either WWC eligibility screens or evidence standards. Appended are: (1) Research details for Barrow et al. (2009); (2) Outcome measures for each domain; and (3) Findings included in the rating for the math achievement domain. A glossary of terms is included. (Contains 4 tables, 4 endnotes and 1 additional resource.)