I'm not 100% sure what the question is! :-)

Masterphill, are you having trouble connecting to your school's wi-fi network?

If you want to stop your tablet connecting to any wi-fi, MP2100 is right, just press the off switch briefly and choose the "offline mode" option. That stops any kind of internet connections. When you want to connect again, press the off switch briefly and choose the "normal mode" option.