64 = 65 Mathemagical Proof

64 = 65 Mathemagical Proof

64 = 65 Mathemagical Proof (Martin Gardner) 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...
Taxi Cab Squares (geometry)

Taxi Cab Squares (geometry)

 Taxi Cab Squares  (inspired by the Inscribed square problem of Otto Toeplitz, 1911) Give your students practice with Cartesian coordinates as they explore a new variant of a famous, unsolved problem of Otto Toeplitz (1911). This problem has a very wide spectrum of...
Scientific Notation Notrivia

Scientific Notation Notrivia

Scientific Notation Notrivia (MathPickle, 2010) Practice Scientific Notation with in a trivia game.  Each question will ask you to place an unknown length in relationship to two other known lengths. Have a mini-competition in class... The game on the left is where you...
Minotaur Gores Pythagoras

Minotaur Gores Pythagoras

Minotaur Gores Pythagoras (MathPickle, 2011) Give your students practice working with Pythagoras. One of MathPickle’s best classroom puzzles. In the newest version Theseus always starts in the upper left and the minotaur is always lurking in the lower left. If...
Three Exponential Explorations

Three Exponential Explorations

Three Exponential Explorations (MathPickle, Polignac, Armstrong) Give your students practice working with bases and exponents while in pursuit of the answers to bigger questions. In this video you will explore three such… including the infamous Polignac...