TED Ed videos

BCAMT weekly tasks   ( intermediate to grade 12 )

BCAMT weekly primary tasks   (K-2)

Teaching Through Problems Worth Solving – approx. grade 8 level

Play With Your Math – new problem every 2 weeks – also, check our their blog for discussion on some of the problems

Open Middle – challenging problems worth solving

Numeracy Tasks from Dr. Peter Liljedahl

Solve My Maths – blog – problems and puzzles

Problems from CEMC (Centre of Education in Mathematics and Computing)

Brainbashers puzzles

Pentomino Information and Problems

Solution for ‘pentomino rectangles’ and some other pentomino puzzles