Didactics & Outreach

MATHEMATICS IS COLORFUL

Objects & Exhibits


Easy Multiplication Tables

Easy Multiplication Tables

There are no repetitions (you do not need 7x6 if you know 6x7) and there is no multiplication by 1. The dedicated webpage contains colorful images for posters and mugs (and also a Factorization Poster).

CR-Clock

The Chinese Remainder Clock

A clock to learn the Chinese Remainder Theorem. The dedicated webpage with articles and animations.

Pi-Clock

Math around the Clock

Mathematical clock dials in the article in Plus Magazine and this webpage.

Sliding mask

Sliding mask for recurrence sequences

The article in Pi in the Sky.

Half-Meter

The half-meter as Montessori tool

The website of the project.

Selected Publications


History & Didactics

Arithmetic Billiards

A geometric construction for the gcd and the lcm.

Master Mind

Understanding Knuth's algorithm for winning Mastermind.

Logic Puzzles

Mathematical Induction

Miscellanea


Articles for Uitwiskeling


The articles (translated into Dutch by Luc van de Broek) appeared in the magazine Uitwiskeling.