Unity Building (Flash Player)

I Have made a game on Unity now i need to show it to my teacher however i use a mac and they use windows i cannot build it on PC,MAC Standalone because our school server will not permit it the only way to do it is to build on flash player however i do not know how to get the real licence without paying a lot of money.

The Flash exporter is not sold any more. Why not build a web player? You’ll get an html file, a unity3d file, and a few others. This should be easy to take to your teacher.