- Benchmark Education
- Compass Point Books
- Consortium on Reading Excellence
- Contemporary/McGraw-Hill
- Continental Press
- The Core Knowledge Foundation
- Edison Schools (Newton Learning)
- Facing History and Ourselves
- Glencoe/McGraw-Hill
- Greenwood Heinemann
- The Grow Network/McGraw-Hill
- Holt McDougal
- Houghton Mifflin Harcourt
- The JASON Foundation
- Kaplan/Score
- Macmillan/McGraw-Hill
- Mondo Publishing
- National Geographic School Publishing/ Hampton-Brown
- Options Publishing
- Pearson Digital Learning
- Pearson Learning Group
- Pearson/Longman
- Pearson/Prentice Hall
- Pearson Scott Foresman
- Peoples Publishing Group
- Rigby Education
- Scholastic Inc.
- SRA/McGraw-Hill
- Sundance Publishers, Inc.
- Thomson Heinle
- Triumph Learning
- Wright Group/McGraw-Hill
- Zaner-Bloser, Inc.