Reducing the number of students in a class, especially in the early grades, is one approach educators have taken to improve student achievement. Class-size reduction programs have been implemented at the state, district, and individual school levels. This pamphlet defines class-size reduction, provides an overview of class-size reduction research, lets parents know what to expect from a class-size reduction program, and answers frequently asked questions. Suggestions for parent action are included in the pamphlet, and websites with additional information are listed. The pamphlet offers information for a variety of audiences, parents primarily, but also policymakers and state-, district-, and school-level educators. (Contains 25 references.) (KB)