FREE Rice 2.0 – science
This game-like website asks questions and offers multiple-choice answers for eight subjects, including science (Humanities, Math, Language Learning, Sciences, English, Chemistry, Geography, and SAT preparation), as well as multiple sub-topics. Users can select any subject and easily switch to a different subject. If their answer is correct, a harder question is presented. If their answer is wrong, correction is provided and an easier question is presented. For each correct answer, 10 grains of rice are donated to the United Nations World Food Program!