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Copy all your notes onto your iPod (through iTunes for an iPod Nano of any generation; through the iPod itself for an iPod touch). On the day of the test, wear some clothing that has pockets (shorts for example) underneath your normal uniform. Keep your iPod in the pockets of the clothing underneath your normal uniform, that way if they ask you to empty your pockets they've got nothing on you. Before you enter school, make sure the iPod volume is silent and the clicker is turned off. When you come across a question you are not sure about, ask the supervisor if you can go to the bathroom, if he/she denies your permission then emphasize that you're too desperate to carry on with the test. Lock yourself in a stall and keep your feet off the floor. When you're securely hidden in the stall take out your iPod and read from your notes. Once you're done, hide the iPod again and act like you've just answered nature's call. The benefit of this method is that they can't ask you to take off your pants so hence there is no evidence that you have cheated.

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Alternatively you could download a file manager application to your device and copy your notes there.      Don't take too long otherwise it becomes suspicious.