User blog comment:HMcCoy/Finished many things!/@comment-24808864-20140923223240

Interesting... so 3rd Grade Math Mission, 3rd grade math exercises, and 3rd grade math: Geometry lended themselves to obvious names.

Now with arithmetic, I feel it is redundant to say "Arithmetic math exercises".

For now I have decided on

Arithmetic Math Mission (Essentially viewing "Math Mission" as the noun and "Arithmetic" as the adjective).

Arithmetic exercises

Arithmetic: Fractions

etc...

I will not be able to use these categories easily until the servers at Wikia update so there is about a 24 hour window if anyone feels strongly I should go in a different direction and wishes to provide input.