Spot It
Making 3 object cards: Construct your own 3-object deck
Stretching Monsters: Help two monsters stretch out and relax
Rational slopes on video game screens: Interactive that explores how many times lines leave the right and the top of the screen before returning to the origin
Irrational doesn't mean everything!: Looks like it fills the screen, but actually not!
Double Hits!: Interactive that explores what happens to a grid that isn't made up of a prime side
What is Spot It?: Explains Spot It. Constructs a 2-object deck.
Cards as Lines: Seeing cards as lines, and getting distracted by what lines are.
Parallel Lines: Adding an extra point to every line for the slope, and now all lines cross!
Wait a Minute, that's Irrational!: Noticing that irrational slopes look like they fill the screen
Missing Almost Everything!: Making sense of irrational slope
Back to the 80s: Making sense of the '80s and discrete slope
Spot It Cards: What all this has to do with Spot It
Duality: Spot It card counting
Stretching you mind to see a donut and eventually looking right out of an infinite forest!

Age Range:
10+, younger audiences will move slower, and won't get everything but the arguments and concepts are beautiful and well worth exposing to everyone!

Elementary topology, rational and irrational numbers, including decimal expansions, using lines to generate rational approximations, and a brush with infinity

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Finite Forests:
Navigating a forest with and without bumping into trees, and what this tells us about Spot It!

Age Range:
11+ a very accessible introduction to modular arithmetic and finite geometry

Subtleties of counting, modular (or clock) arithmetic, lines using modular arthmetic (a brush with projective space)

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Spot It: Experimentation:
Play Spot It. Simplify the game. Try making a deck of 2-object or a deck of 3-object cards. Culminates in a curious observation about lines

Age Range:
5+, everyone will enjoy these activities

Exploring with Trial and Error. Simplifying and altering questions as a mode of inquiry. Causality

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Straight Lines:
What is a line? What does parallel mean? And how to describe a line mathematically

Age Range:
7+, younger audiences might need more guidance, and second half (describing the equation for a line) is more suitable for 11+

Lines, parallel lines, lines in 2D and 3D, and the equation for a line

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