I like math and I use a website called Khan Academy

Khan academy is a mastery learning website where you can learn anything from counting to calculus. I use Khan Academy for my school math and sometimes just for fun. Mostly I use Khan Academy for forth through seventh grades, I find that Khan Academy helps me learn the math that I like at my own pace.

there are two types of tasks. Practice: this is where you start to learn a skill, usually you have to get five to three problems in that skill correct in a row to get it practiced, if you don't know how to do that skill you can usually watch a video that will teach you how to do the skill. Mastery challenge: here you can master the skills you have already practiced by answering a problem in that skill.

There are five levels from practiced to mastered that are: Not practiced, Practiced, Level 1, Level 2, and Mastered.