im doing a chess tournament in skool so anyone got any tips on how to beat a bunch of 12-year-olds in chess?

 

First of all, don't think that they don't know how to defend. Don't go out on a reckless attack. Just develop all of your pieces, look for a weakness, and ATTACK!

Don't rush, no matter what! If you rush, you'll do something stupid such as lose your queen early in the game. Think before you act, no matter how good your plan sounds. You can also go on 101chesstips.com. It help you a ton!  

I'm guessing by how you spelt school as "skool" that you are around 12 yourself.  In that case, you're playing your peers.

 Don't assume they are all awful, and play solidly!
Make sure your moved piece isn't going to be taken by your opponent without a recapture/compensation, as that's the most common way to lose a game at your age.

how's your game? are you an experienced player or are you novice or somewhere in the middle? if your experienced just play your game. regardless of that, i would just play the board and not worry about my opponents age or abillities