Clip 25/41: Standard 3: Construct Arguments & Critiques Using Algebra Part C1
Overview
Mathematically proficient students understand and use stated assumptions, definitions, and previously established results in constructing arguments. They make conjectures and build a logical progression of statements to explore the truth of their conjectures.
Disston leads his students to a deeper level of noticing. The lesson keeps recycling or layering the ideas, forcing students to new levels of describing and deciphering the symbol strings, sorting and classifying. The students are now much more talkative than at the beginning of the lesson. They seem more invested in reaching an understanding and questioning each other.