One to one mentoring has been around for a while, but recently there has been an increase in the number of parents finding this support for their children. Some children will learn more from one to one tutoring than from being in a classroom environment. There is a debate as to whether one form of education is better than the other, but doing both is surely more beneficial.
With one to one tutoring, the teacher is able to tailor all task specifically towards that individual in terms of ability and personal circumstances. It may be possible to eliminate all other distractions that you may find in a classroom such as other pupils and noise levels allowing the pupil to concentrate 100% on the task in hand.
One to one tutoring was often seen as very expensive and something that only very wealthy people could afford, but with many tutors offering very competitive rates, it is now widely available to all.