Core and Supplemental Math Materials: Selection Trends Across K–12

Summary

Ensuring instructional coherence across grade bands is essential for student success, yet many districts struggle to maintain consistency in their core math curricula. While the market offers vertically aligned programs, districts often mix different core materials between elementary and middle school, creating potential gaps in instruction. However, supplemental resources—many designed for K–12 use—are often adopted more consistently across grade levels, offering a potential pathway to greater alignment.

Key Learnings:

• Few Districts Use the Same Core Program Across K–8: Despite the availability of vertically aligned curricula, only 27% of districts select the same core math series across elementary and middle school.
• Supplemental Materials Are More Consistently Used Across Grades: 65% of districts adopt the same supplemental math materials for K–8, while only 45% maintain consistency across K–12.
• Selection Trends Impact Instructional Coherence: The mix of core and supplemental products in use influences districts’ ability to maintain a clear, connected learning progression across grade bands.