Independent schools, like state grammar schools, are free to select their pupils, subject to general legislation against discrimination. The principal forms of selection are financial, in that the pupil's family must be able to pay the school fees, and academic, with many administering their own entrance exams – some also require that the prospective student undergo an interview, and credit may also be given for musical, sporting or other talent. Entrance to some schools is more or less restricted to pupils whose parents practise a particular religion, or schools may require all pupils to attend religious services.