Hope I'm not throwing cold water on it for you, BUT.. . . .
As far as l know about the newish FAA/TSA rules you can only give instruction as long as it is not for a new rating, ie not for a checkride. Otherwise you and your student must go through the same TSA bull!!!! as for flight training in the States.
Also as an FAA instructor have you completed your fssa training and . . . . . . .
Suggest you visit
www.aopa.org/tsa_rule/ or
http://www.tsa.gov/assets/pdf/recurr...ool_module.pdf hope this helps
malc