The Math Dude makes awesome videos to help you understand Algebra topics. He has a whole collection of videos really useful videos, check them out!
This website gives definitions, examples, and explanations for tons of topics. If you click 'Site Map' under Algebra or Pre-Algebra, there is a list of any topic you may need help with!
Desmos is the best online calculator there is! If you don't have a graphing calculator, Desmos has tons of cool features to help you out in math class.
Cool Math is a website that has lots of resources. This includes lessons, practice games, puzzles, and an extremely useful math dictionary!
If you like music, Westerville South High School has made some catchy math music videos to help you remember the hard concepts in Algebra. Check them out!