Khan Academy is an educational website that teaches subjects. Today, I went to the website and used it. I first clicked Practice. It lead me to a page showing different levels of math. I clicked addition and subtraction and it led me to another page. The next page showed addition math problems. I typed the answer into a little box to the left and clicked "check answer." My answer was right and another button appeared saying " Next question." I clicked it and the another question appeared replacing the first one.g
There are also plenty of videos on different subjects to watch such as videos on solving certain types of math equations.