An ongoing curation of web resources of interest to the teaching and learning of mathematics.

Euclidea: An unbelievably intuitive game to explore geometric constructions.
Multiplying Binomials w/ Algebra Tiles on Desmos.
Collection of Desmos polygraphs.
Tap into teen minds - a series of resources.
Grade 6-8 materials from Illustrative Mathematics.
Current World Stats.
An interface to explore and create
Rock, paper, scissors game that learns how you play.
A collection of Escher's work.
A visual canvas to explore symmetries.
A collection of math as represented in movies.
Generate hyperbolic tilings.
A site to build large number numeracy by comparing quantities.
Make Desmos gifs (from Chris Lusto).
#MTBoS Search Engine: Search posts from math bloggers.
Building spatial reasoning with perspective diagrams.
Every calculator you could possibly want.
A helpful collection of puzzles and curiosities.
SolveMe Mobiles: Balancing Game.
A collection of circle graphs of the world’s flags.
A website of number talk images.
A list of tasks organized by topic.
John Mason's Website(s).
Collection of puzzles organized by grade.
Math Hombre's page for Interactive resources.
Build custom graph paper.
A snazzy collection of interactive simulations.
Don Steward's Resource Blog
Match a graph to a moving object.
Puzzle Game: Directing Lasers working with Fractions.
Problem Solving Classrooms. A guiding piece for grade 8.
Estimate when shape is half full.
A variety of logic mazes from Robert Abbott
A set of resources organized into courses from the Mathematics Vision Project
An animated, interactive platform for a variety of mathematical concepts.
A simple, intuitive platform to make geometric shapes with coloured sections.
A collection of upper middle years problems from Simon Singh
A site to include simple, Unicode math symbols in your typing.