This compendium organizes information on the math and science projects sponsored by NCER and NCSER into two main sections: Mathematics and Science. Within each section, projects are sorted into chapters based on content area, grade level, and intended outcome. In determining the chapters, we considered the emerging college- and career-readiness standards. Many states have formed and adopted such standards to help create guidance for their K-12 school systems. Thus, we have separate chapters for prekindergarten, the K-12 system, and adult and postsecondary education system within each section to reflect the states' use of college- and career-readiness standards. Because projects may have multiple foci (e.g., math and science assessment), some projects were assigned to multiple sections and chapters. (See Appendix A: Compendium Process for a discussion of the process used during the compendium's development.) Each project included in this compendium is represented by a brief description that contains an overview of the major components of the project. Readers who would like more information about a project may follow the hyperlinked award number in each project description to access the Institute's online search engine, which contains the full abstracts upon which the compendium's descriptions are based. The following are appended: (1) Compendium Process; (2) Instructional Interventions by Chapter; (3) Professional Development by Chapter; (4) Educational Technology by Chapter; and (5) Assessment by Chapter. An index is included.