DRC/CTB
< DRC
| Company type | Publishing |
|---|---|
| Founded | Los Angeles, California (1926) |
| Founder | Ethel Clark |
| Headquarters | 13490 Bass Lake Road Maple Grove, MN, United States |
Area served | Worldwide |
| Parent | Data Recognition Corporation (DRC) |
| Website | CTB.com |
DRC/CTB (CTB) was a publisher of educational assessment for the early learner, K–12, and adult basic education markets. DRC/CTB was a division of Data Recognition Corporation (DRC) until being fully merged into DRC's Educational Services division. From 1965 to 2015, the company was known as CTB/McGraw-Hill, a division of the McGraw-Hill companies, and prior to 1965 California Testing Bureau was an independent company.
CTB has published many assessments including California Achievement Tests (CAT), Tests of Basic Experiences (TOBE), and TerraNova.