The goal of this study was to gather comprehensive evidence about the alignment of the Smarter Balanced summative assessments to the Common Core State Standards (CCSS). Alignment of the Smarter Balanced summative assessments to the CCSS is a critical piece of evidence regarding the validity of inferences students, teachers and policy makers can consider regarding assessment results (HumRRO, 2014; Kane, 2011). Content alignment in the case of the Smarter Balanced system must be demonstrable through each step of the evidence-centered design of the summative assessment system. Therefore, "alignment connections" were defined and reviewed with the Smarter Balanced Technical Advisory Committee in advance of evidence collection and analysis. These connections describe relationships between content standards, content and/or item/task specifications, item/task evidence statements, test blueprints, item/task pools, computer-adaptive test (CAT) algorithms, and ultimately the summative assessments themselves. Across connections, the Smarter Balanced English language arts (ELA)/literacy and mathematics assessments were found to be mostly to fully aligned.