Of course, now that Desmos has their Card Sort feature, there are some good ones being produced by the math community. Like this one, for example, from @mathycathy about sorting statements about real and rational numbers. It's short and sweet and it starts to show some of the different ways you can do sorts with this new Desmos feature.
Curriculum Tags: Gr7, Gr8 https://teacher.desmos.com/activitybuilder/custom/578a36ac0912cdc123cdb4d2#
Curriculum Tags: All
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
I love this one from @standupmaths where he shows that the current Euro 2016 soccer ball is actually based on a cube. Some cool 3D tessellation here.
Curriculum Tags: Gr7, Gr8
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MAT1L, MAT2L
Restaurant tip help sent to me by @dockterman with a "Grrr...math is hard" message. We have our work cut out for us. pic.twitter.com/gswphwQ3ql— Marilyn Burns (@mburnsmath) July 13, 2016