#maths (5 links)
- NRICH nrich.maths.org
Rich, engaging mathematical resources for ages 3 to 18, including research-informed teacher support. NRICH resources are free to use for teachers, students and parents, and open to all.
- Polypad polypad.amplify.com
Our mathematical playground is filled with unique tools that allow students to play and explore – and they’re completely free to use.
- Aspect Ratio Calculator (ARC) andrew.hedges.name
One goal of this was to figure out how much of the variance in score comes from the tile order and how much comes from the board, given that a tile order would be expected. It turns out to be about half-bag, half-board. [...] The blank is worth about 30 points to a good player. [...] The Q is a burden to whichever player receives it, effectively serving as a 5 point penalty.
- Adactio: Journal—Re-finding five numbers adactio.com
Simon Singh’s Five Numbers radio series on huffduffer