• Students test conjectures. For example, they might investigate the following
proposition: “You cannot draw a circle touching all 3 vertices of a 3, 4, 5 triangle.”
Students explain their reasoning. They then make a more general conjecture and
test it.
Using this example, teachers could assess students’ ability to:
- make conjectures in a mathematical context (MP5);
- use their own language, and mathematical language and diagrams, to explain
mathematical ideas (MP5).