Free Rice

What is better than solving problems and learning new things? Doing exactly that, while fighting the hunger in Africa! "Free Rice" is a website, on which you choose a topic (vocabulary, science, math, etc.), and every time you answer correctly to a question, you contribute 10 grains of rice to people who need them. By clicking the banner below, you will be redirected to Just make sure to disable your ad-blockers, since hiding the (non-intrusive) ads may prevent you from accumulating donations.