re: Is there anything that I should know before trade school?

Im not sure what you going for but say you going for welding. Don't fall for the lie that you will be making $40 an hr straight out of school, it doesn't work that way. You will have to prove that you can show up for work, piss clean and you're not a frick up before you get top money.

My son went for Electrical, ended up getting hired on with a marine electrician company installing camera systems, KVH Units (TV and Internet) Steering systems, fuel flow, GPSs.... stuff like that. He doesn't make a lot hourly but they pay him to travel and pay his mileage so he does pretty well all things considered.

My advice would be don't expect to get top dollar straight out of school. You will have to earn your keep. Show up on time, an employer can teach you a lot of things but they won't teach you if you aren't dependable. Ask a lot of questions and make sure you understand your job task fully.