The Twizzle Trail

Arrow Arithmetic 1

Age 14 to 16 Challenge Level:

The first part of an investigation into how to represent numbers using geometric transformations that ultimately leads us to discover numbers not on the number line.

Arrow Arithmetic 2

Age 14 to 16 Challenge Level:

Introduces the idea of a twizzle to represent number and asks how one can use this representation to add and subtract geometrically.

Arrow Arithmetic 3

Age 14 to 16 Challenge Level:

How can you use twizzles to multiply and divide?

Twizzle Arithmetic

Age 14 to 16 Challenge Level:

Arrow arithmetic, but with a twist.

Twizzles Venture Forth

Age 14 to 16 Challenge Level:

Where we follow twizzles to places that no number has been before.