Clarity: "The Repeating Decimal": Making Student Thinking Visible: Middle School Mathematics
Ms. D'Angelo is consistent with asking students to follow up their answers with explanations. The content is the repeating decimal sign in mathemesics, e.g., a horizontal bar over the three in decimal three-three (.33). The discussion is what the bar means and how it could go over two digits in a decimal, meaning both of them repeat forever. This 6+ minute video is ideal for study groups that want to study robust class discussions: Making Student Thinking Visible. She uses non-judgmental language, never says right or wrong, always asks a follow up question of the student, and gets other students involved in responding to a student's answer.