Alright. Saying you don't have any of that hook-up stuff. No programming knowledge. And you're on a public computer at school. The best way in my opinion to get around blocked websites is to go to google, and type in phproxy. Thats a proxy that runs off of php script, so basically, its just you type in the url of where you want to go, and you're off. And, if the school blocks your next favorite bypass website, you just go to google and type in phproxy again. Theres thousands of results. You'll have enough to bypass stuff probably as long as you're going to be attending school.
Some examples of phproxys that I've used before my school blocked them as well are: