This catalog aims to help educators locate materials which will assist them in effectively teaching thinking skills. Research for Better Schools (RBS) serves as the lead educational laboratory for the Department of Education's national project on thinking skills. A total of 248 resources, including pamphlets, documents of activities, computer software, and pictures, are presented in the following curriculum areas: (1) language arts and reading; (2) math; (3) science; (4) social studies; and (5) a combination of subjects. Each entry includes the title, developer, type of material, purpose and use, thinking skills, description of the material, publisher, cost and order number, and grade level. Within each subject area, entries are arranged by grade level. Some materials can be used over a wide range of levels. An index at the beginning of each section lists materials by traditional age groupings: kindergarten and primary grades (K-3), upper elementary (4-5), middle school (6-8), and high school (9-12). An alphabetical listing of all entries appears at the end. (KS)