Can’t go wrong with that. :)
I love Free Rice, which combines a word test with goodwill. For every word you get right on the vocab test, they donate 20 grains of rice to the needy via the United Nations.
The test is hard! My goal is eventually get a 50, but I always screw up at around 47. I’ve only been doing it for a while though, so hopefully I will improve soon.

