Yes learning on a live model is a good idea, we agree in principle, but unfortunately insurance companies will not insure the students until they are signed off by the assessor and certificated and have their insurance policy active. (They will insure the tutors who are teaching the class, but most tutors we know would not wish to teach students hair extensions on live models)
Insurance companies will not insure students who are learning hair extensions on a live model because from the insurance companies point of view there is more likelihood of some accident with a trainee learner especially on a live model especially if using hot equipment.
A fast track course is usually just one day, so for a member of the public who is a non-hairdresser learning with hot equipment practicing on a live model could be very dangerous and lead to accidents.
For non-hairdressers, learners and hairdressing trainees we encourage them to do our 2 day course. (The first day they pay for, the 2nd day is FREE).
Practising your new skill on a Hairdressing Training Head is a much safer option from a Health & Safety whilst Training option.
WELLA at Manchester who do various Cutting Courses always teach on Manequinn Training Heads for Health & Safety reasons.