The Partnership for Assessment of Readiness for College and Careers (PARCC) mathematics items measure critical thinking, mathematical reasoning, and the ability to apply skills and knowledge to real-world problems. Students are asked to solve problems involving the key knowledge and skills for their grade level as identified by the Common Core State Standards (CCSS), using mathematical practices, reasoning, and modeling. PARCC assessment is administered in paper-based and computer-based formats; both modes contained constructed response items. This document is designed to help educators understand the scoring of constructed response items.