I'm addicted to video games. Do you guys know methods on how I can focus on school more than games?

I have been in your shoes before. What I found most helpful for me was totally breaking from video games. I shut off the internet and turned off my router. Then I configured my computer so it could not connect to the internet. In the movie Fireproof, Caleb Holt actually took a bat and smashed his computer up so he could break his addiction to pornography. I'm sure that would work for you too, but if you would rather not be so dramatic, you can setup your computer to shutdown within a specified time (let's say 1 hour).

It also helps to remind yourself why you should study. If you don't work hard in school now, you may run into problems later on in your life, and your gaming skills will definately not be able to help you then.

Hope this helps for you, and I wish you the best in breaking your addiction.