This document provides tips and strategies for using formative assessments in a differentiated classroom. It discusses using formative assessments to check for understanding during instruction rather than just evaluating learning after the fact. Some specific strategies mentioned include turn-and-talk activities, exit tickets, and questioning techniques to actively engage all students, not just a select few. The document emphasizes the importance of giving students opportunities to explain and apply their learning within short time frames aligned with age-appropriate attention spans in order to facilitate long-term retention of information.