This is a no sew project, So all you need is a desired T-shirt, and a pair of scissors.
There are two different ways in which I have seen these cuts executed at my school. From what I can tell, there is a way for guys, and a way for the girls. Each will be described here.
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Step 1: What you need, and to know.
1. Your t-shirt!
2. A pair of scissors.
Step 2: Making the cuts: Male Version
Male Version: Starting at the bottom of the shirt, make cuts going horizontally about 6 inches long, maybe half way or more up the shirt. I made my cuts about 1 1/2 inches away from each other. After this you may want to cut off the sleeves, but I left mine on. Do this for both sides and the male version is complete and you now have your new shirt!