Core Knowledge (1993–2013)
- What Your 6th Grader Needs to Know (1993)
- Books to Build On (1996)
- What Your Kindergartner Needs to Know (1997)
- What Your First Grader Needs to Know (1998)
- What Your Third Grader Needs to Know (2002)
- What Your Fifth Grader Needs to Know (2006)
- What Your Preschooler Needs to Know (2008)
- What Your Second Grader Needs to Know (2013)