Cartesian
Give your students practice with Cartesian coordinates as they explore a new variant of a famous, unsolved problem of Otto Toeplitz (1911).
Printable puzzle-sheet here.
Get your older students to break apart a convincing mathemagical trick by linking it to the Fibonacci sequence and calculating the slopes of some line segments. Younger students derive a lot of pleasure by figuring out that some things that look likeĀ triangles are not really triangles.
Printable 8×8 cake here.
Give your students practice calculating slope and playing with parallel lines.
Printable puzzle-sheets here.
Play with lines in a Cartesian coordinate system in this 1917 puzzle of Henry Dudeney.
Costas arrays were part of submarine warfare and a great way to get practice with slopes.
Please use MathPickle in your classrooms. If you have improvements to make, please contact me. I'll give you credit and kudos š For a free poster of MathPickle's ideas on elementary math education go here.
Gordon Hamilton
(MMath, PhD)
