Zearn is as useless as the dirt on a highway. It's reviews that they say are green ratings are most likely faked and just by teachers. The "games" they make you play to "learn" are grey and boring. Seriously who likes this site? I'm pretty sure everyone can agree with me when I say Zearn is a evil company that masks the bad reviews. You learn nothing from the questions and videos. They treat you like a three year old because every time you get one thing wrong you are immediately sent to a help question. Over all Zearn is horrible. Please for your own good don't use it.