Formative assessments are informal assessments that provide feedback to students and guide instructional decisions, rather than being used for grading. They allow teachers to understand how individual students learn best. The document provides many examples of formative assessments teachers can use, such as exit tickets, checklists, and observations. It also suggests ways to track assessment data, such as using clipboards, student folders, or class lists. Teachers should analyze formative assessment data to determine which students need extra help, learn best visually or through hands-on activities, and are not being challenged enough. The data also helps teachers differentiate lessons to meet individual student needs.