How does one get trained to do hair extensions?

Hi! I'm a cosmetology student, and they don't teach anything about extensions in school, which is one of the main reasons I want my license. Can anyone offer any advice on who to contact, or where to go, to get trained to do extensions? Thanks!How does one get trained to do hair extensions?
i have been a hair dresser for 15 years and and you will need to go to a hair show and sign up for the classes. or call hair extension places like hair locks, or the company that makes them you can find their names on the web. they hold classes all the time and everywhere