You know Free Rice, right? Multiple choice vocabulary builder, for each word you get right, the site donates 20 grains of rice through the UN World Food Program to help end hunger.
It's not just vocabulary anymore. They've added several other subjects: famous paintings, chemistry symbols, multiplication tables, world capitals, English grammar, and some foreign languages. So cool!
Also, you can even pick the level you want to play at now. Very cool. Had to see what the fuss was about at level 60 in the vocabulary since I've been stuck at 54; I just got 3 words right at 60. Sweet. Think I'll switch subjects before I break my streak.
A year ago on TTaT: Dream soundtrack