I know this is an old post, but I'm a solo engineer and dad working on a tool for helping my son master Math. I'm looking for beta testers if you are interested in giving it a try. Its free. PM me.

Weather.com is owned by IBM in addition to Weather Underground, and The Weather Channel. Building great consumer weather media is probably very far down their list of priorities.

Common core also includes other topics like.
Measurement and Data (length, time, money).
Geometry (shapes, fractions through partitioning).