This document discusses the importance of differentiation and formative assessment in teaching. It emphasizes that if students are not learning through the teacher's methods, the teacher must adapt their teaching style to how students learn best. Formative assessments should be used frequently to identify struggling students and drive intervention strategies before summative assessments. The document suggests that teachers typically respond to struggling students with additional time and support, while high-achieving students may not be challenged. Overall, it promotes adjusting instruction to individual student needs and monitoring progress through ongoing assessment.