agree with Eheath.
Some school projects are ok, but anything where you have to cite accurate sources you will have a hard time writing about skiing. There just isn't alot out there that's credible from your teacher's eyes.
maybe angle in on a specific aspect of skiing as a whole that CAN and has been documented if you need to do a ski related project. competitions, costs of gear, number and type of participants, etc.
Just trying to write about double corks and rail slide type skiing is setting yourself up for a C at best.