On this page, there will be a record of daily lectures, generally posted after the lectures, with handouts/links etc.

**Monday, January 13, 2020**- First lecture!
- Polygon exploration activity: Your First Mission (investigating polyhedra) and the polyhedron pictures. See also this, for fun.

**Wednesday, January 15, 2020**- A first proof (if n is even, then n squared is even), and a video of me talking through it.

**Friday, January 17, 2020**- We talked about active reading of a textbook. Here’s a post explaining that. We used this textbook as an example.
- We took up proof writing and then critiqued some example student proofs.

**Wednesday, January 22nd, 2020**- We had our first proofs quiz!
- We talked about the basics of sets: element, equality, subset, empty set

**Friday, January 24th, 2020**- We covered set builder notation and had a little practice in the form of a game: set game instructions and cards.
- We had our first badges quiz, which was just Sets I and Sets III.
- Here’s a 2 minute video that addresses the issue of nested sets.

**Monday, January 27th, 2020**- We did some set builder notation examples.
- We discussed the notion of a Cartesian product and did a worksheet on Cartesian products.

**Wednesday, January 29th, 2020**- We introduced power set, and did a worksheet on Subsets vs. Elements.

**Friday, January 31st, 2020**- We introduced proof by contradiction, using the definition of rational and irrational numbers.

**Monday, February 3rd, 2020**- Info on studies about cognition and math:
- Worksheet on negation handed out in class.
- My video on if-then statements.
- My video on the Dystopian Perspective on negation of statements, particularly if-then statements.

**Wednesday, February 5th, 2020**- We took up the badges quiz, and homework worksheet on negation above.
- We had a proofs quiz.

**Friday, February 7th, 2020.**- We did the beginning of a worksheet on Setting up Contradiction.
- We did some Contradiction Puzzles. These are proofs by contradiction that are fun because they have a creative spark to them.
- We had a badges quiz.

**Monday, February 10th, 2020.**- You had a substitute teacher: you had a proofs quiz, and finished up material on sets.

**Wednesday, February 12th, 2020.**- We introduced the idea of Boolean algebra and did truth tables.
- Basic Truth Tables for filling in, and a filled version.
- SPQR Logic Game: cards and instructions.

**Friday, February 14th, 2020.**- We introduced Proof by Contrapositive and did examples, then a badges quiz.
- Proof by Contrapositive Setup Sheet and solutions.

**Monday, February 17th, 2020.**