Not all pupils are suited to mainstream education settings. Young people who do not attend mainstream school due to behavioural issues, short or long-term illness, special educational needs, mental health needs or school exclusion might move to a pupil referral unit or alternative provision. With smaller class sizes allowing for teachers and support staff to know each of their students individually and tailor their teaching to suit their needs. There is curriculum flexibility and teachers bring with them a wealth of professional and personal experience with a wide range of valuable skills to support each young person.