Although there are many agencies offering private tuition with a wide range of tutors, standards do vary because tutors often have varying qualifications. The variety of the provision on offer can be determined by a search on the Internet for private tuition. Researchers have found out that there may be over 25% of state school pupils in England who have private tuition after school to help them with their schooling. Furthermore a survey in England of 3,000 primary and secondary school children showed 27% of them to be receiving private tuition.