"Peer-Assisted Learning Strategies" (PALS) is a peer-tutoring instructional program that supplements the primary reading curriculum. Pairs of students work together on reading activities intended to improve reading accuracy, fluency, and comprehension. Students in the pairs--who alternately take on the roles of tutor and tutee--read aloud, listen to their partner read, and provide feedback during various structured activities. This report focuses on "Peer-Assisted Learning Strategies" reading programs for grades 2-6 and high school. Ninety-seven studies reviewed by the What Works Clearinghouse (WWC) Adolescent Literacy topic area investigated the effects of Peer-Assisted Learning Strategies. One study (Fuchs, Fuchs, Mathes, & Simmons, 1997) is a randomized controlled trial with randomization problems that meets WWC evidence standards with reservations. The remaining 96 studies do not meet either WWC evidence standards or eligibility screens. Appended are: (1) Research details for Fuchs, Fuchs, Mathes, & Simmons (1997); (2) Outcome measures for each domain; and (3) Findings included in the rating for comprehension domain. (Contains 3 tables and 12 endnotes.)