The instructional materials reviewed for CK-12 Interactive Middle School Math for CCSS partially meet expectations for Alignment to the CCSSM. In Gateway 1, the materials for Grades 6 and 7 meet expectations for focus and coherence by meeting expectations for focus and partially meeting expectations for coherence. In Gateway 1, the materials for Grade 8 meet expectations for focus and coherence by meeting expectations for focus and meeting expectations for coherence. In Gateway 2, the materials for Grades 6-8 partially meet expectations for rigor and practice-content connections by meeting expectations for rigor and partially meeting expectations for practice-content connections. Since the materials did not meet expectations for Alignment, Gateways 1 and 2, they were not reviewed for Usability in Gateway 3.