Sep 8, 2018 Introduction to combinatorics

Apr 28, 2018 Regular tessellations

Oct 28, 2017 Graphs and cycles

Oct 14, 2017 Functions and Pairing

Oct 7, 2017 Binomial coefficients and Catalan numbers

Sep 23, 2017 Modular counting and the table setting problem

Sep 16, 2017 Recursion and the four numbers game

Sep 2, 2017 The greatest common divisor and probability

Apr 22, 2017 Sending coded messages

Apr 1, 2017 Recognizing patterns

Mar 11, 2017 Falling chickens

Feb 25, 2017 A tree of fractions

Feb 11, 2017 Patterns in data

Jan 28, 2017 The logic of calculators

Jan 14, 2017 Parametric equations

Dec 10, 2016 The secret lives of permutations, part two

Dec 3, 2016 The secret lives of permutations

Nov 12, 2016 Bart vs Lisa vs Fractions

Oct 29, 2016 Mental math, version two

Oct 15, 2016 Adding together infinitely many numbers

Sep 24, 2016 Ovals upon ovals!

Sep 10, 2016 Mars moon mission

May 21, 2016 The game SET

Apr 30, 2016 Cave person games

Apr 16, 2016 Taking in the whole room

Apr 2, 2016 Multiplying points in the plane

Mar 12, 2016 Graph isomorphism

Mar 5, 2016 Toroidal doodles

Feb 20, 2016 Sudoku and latin squares

Feb 6, 2016 STEM exploration day

Jan 16, 2016 Toroidal polyhedra

Dec 5, 2015 Tournament Winners

Nov 21, 2015 Counting simplified fractions

Nov 14, 2015 Quadrilaterals

Oct 31, 2015 Spook-tacular mental math

Oct 17, 2015 Multiplication with a slide rule

Oct 10, 2015 Solids from regular sides

Oct 3, 2015 Fractals and dimension

Sep 19, 2015 The ultimate toothpick pattern

May 19, 2015 Origami and geometry

May 12, 2015 Games with modular arithmetic

Apr 18, 2015 Hyperbolic surfaces

Apr 4, 2015 Moving points

Mar 14, 2015 Three point one four one five something

Mar 9, 2015 Infinite counting numbers

Feb 21, 2015 Patterns in the Fibonacci numbers

Feb 7, 2015 STEM exploration day

Jan 24, 2015 Ways to write numbers

Jan 17, 2015 Shapes and motions

Dec 6, 2014 Number graphs

Nov 8, 2014 Numbers on clocks

Nov 1, 2014 Beguiling tilings

Oct 25, 2014 Coloring maps

Oct 18, 2014 Polygons and area

Oct 11, 2014 Spheres and geometry

Sep 27, 2014 Downtown walking distances

Sep 20, 2014 Sona sand drawings