Khan Academy

Khan Academy is this fun way to learn. You get badges and you get to practice skills and then get level one then level two then you master it. If you master five then you get a meteorite badge those are the easiest  to get. Then moon badges and then sun badges and the almost impossible ones to get are black hole badges. I have 53 meteorite badges and 25 moon badges 5 earth badges and i am about to get three sun badges, I only need to master two more mastered!!!! I know one person got a black hole badge from getting 10,000000 points. Sun badges give you like 30,000. I am about to get 80,000 points from Copernicus. I have 198 mastered it takes 200 to master to get Copernicus.