The purpose of this article is to describe downward and upward extensions of Peer-Assisted Learning Strategies (PALS) in reading, which was originally developed for Grades 2-6. Extensions have occurred for kindergarten, first grade, and high school. We begin by describing our rationale for the development of PALS. Then we provide an overview of the Grades 2-6 PALS program and illustrate why additional PALS activities were required to address younger and older students' developmental needs. Finally, we describe the PALS extensions.