The document discusses formative and summative assessment practices for co-taught classrooms. It defines assessment and describes how assessment should involve students and focus on learning rather than testing. Effective assessment identifies learning goals, involves students, and provides feedback. Formative assessment in particular should help students understand where they are, where they are going, and how to close gaps. The document provides examples of formative assessment strategies and discusses using standards-based grading to focus on achievement over factors like behavior. It emphasizes using assessment to improve learning rather than compare students.