I have been banging my head this year trying different math curricula for DS9 (level is ~PreAlgebra with some gaps). Looking back at my posts, I see I posted almost the exact same thing in February. I am not looking for another math curriculum per se, but a stack of interesting resources to strew (physically and electronically). DH thinks that we should try to increase the input and go easy on demanding output for now.

So, lay it on me! What are your favorite math resources for a kid who prefers Vi Hart over Khan Academy?

I'll start with what DS likes:

Books:
Murderous Maths
Life of Fred
Beast Academy (books only, not the workbooks)


YouTube:
Vi Hart (DS has probably watched all of her videos multiple times)
Numberphile

Other:
ZomeTool