Anything you do with the permission of the barn owner leaves the barn owner potentially liable. Local laws vary greatly from area to area. In my area you wouldn't be allowed to teach without certification saying you know what you're doing.
Also- in connection to the previous poster who said as a 16 year old you cannot be sued- yes you CAN. Until you hit legal independence (18+ years old and living on your own,) your PARENTS are legally responsible for you. That means if you do something and someone wants to sue you- they don't sue you- they sue your parents and your parents are responsible for paying/legal issues/etc.
IMO- this leaves you in a VERY potentially sticky situation. It would be different if you had someone who was an adult around supervising (and you were assisting such as with a club or something,) but this sounds like you by yourself. All you need is one person who complains/falls/looks to start trouble.
If you do this- make sure you are legally in the right and that you aren't breaking any local laws. There's nothing that says you don't know what you're doing but you DO want yourself, your parents, and your BO legally protected as much as possible. Legal and medical bills are expensive! (I speak from experience- health insurance saved me $40,000+ from surgery bills in a nasty fall riding during a lesson.)
Do what you feel in your heart to be right- for you'll be criticized anyway. You'll be ****ed if you do, and ****ed if you don't. - Eleanor Roosevelt
Last edited by Nitefeatherz; 02-07-2012 at 12:08 AM.