Hi, I’m Lee. He/They. Thanks for checking out my math pages.

I put this site together initially to hold all my GeoGebra resources in a way that makes sense for me and my students to access. I started creating with GeoGebra in 2014. At that time I was writing an online, IB resource for kognity.com. This project inspired me to write an online resource for my own students in BC Canada. Its a work in progress!


Since starting out as a math/outdoor ed teacher in Cumbria, England in the year 2000 I’ve taught in schools in Norway, Costa Rica and in BC Canada. For 12 of those years I taught the IB diploma.  I now teach high school math in my local school district.

Otherwise, I take lots of opportunities to be out and about or to be making things. The kids are 8 and 12 and we like to cook, hike, bike, kayak, camp, sew, explore intertidal life, swim, do puzzles, play games, lots of games. I also enjoy woodwork and love to hike with our dog Ben the bernedoodle on our local trails.

My first preference for teaching is through person to person in person dialogue using the things around about us for problem solving and mathematizing. GeoGebra offers a super convenient online place for problem solving and mathematizing. I’m always looking for ways to invite kids/learners into math to enjoy the satisfaction of having things work out.

Land Acknowledgement

I live and work on the southern tip of Vancouver Island. The southern tip – Victoria, Langford, Sooke, the San Juan and the Gulf Islands are the traditional territories of the Lkwungen (Lekwungen) peoples. Where I live and work (Sooke/Westshore) was an area rich with resources looked after for millennia by the Scia’new Nation (Beecher Bay), the T’Sou-ke Nation and the Pacheedaht Nation. Native Land Map

I was born and raised in Edinburgh, Scotland.

I acknowledge my role in the journey towards reconciliation. 

Specifically, mathematics is a human endeavor present in all cultures. Much of the math taught in high school and represented in this website has been handed down to us for many hundreds of years through several languages and cultures. The story of math can be mistakenly presented as a single, complete, linear story.  However the story of math has several overlapping layers and many independent plot lines. In order for the present and future math community to be representative an effort is required to dismantle misconceptions and barriers and build bridges to encourage diverse participation.


Please send comments, suggestions & error corrections to tentotwelvemath@outlook.com. Thanks!