The candidate has insufficient or inefficient/poor driving instructor training. 

With a little care, you can make sure that you don't waste money on ineffective training. Take lucrative sounding job offers with a pinch of salt - anyone can offer a job, but not everyone can offer you work. Whether working for yourself or a company the amount of work you get will be mainly determined by your quality of driving instruction and customer service.

When you have qualified as an Approved Driving Instructor you will find that it is relatively easy to find work - if your training is poor you will not qualify and there will be no work anyway!

Some companies offer 'Free extra training' or 'Unlimited training' if you fail to qualify. The first point here is that if the initial driving instructor training course is up to scratch you shouldn't fail.

However, what is more worrying is the 'small print' in some agreements often saying something like: "If we consider you have contributed enough effort".

You might then find that when trying to get extra training you are faced with:

Part 1 fail: "Re-book and do more home study." - Some companies may allow you to sit in on classroom training, but most do not offer constructive classroom work for Part-One.

Parts 2 or 3 fail: "We consider that you have not worked hard enough and that is the cause of your failure. Because of this we cannot offer more training without cost." - Some companies will allow you to sit in the car and watch other students train, but do not allow practise in the front But remember, these are practical exams ... Practise is essential.

Note that these things are as likely to happen with ORDIT registered companies as with non-registered companies.