Hi This is a very simple safeguarding issue. Legally the only way you can "send home" a student (excepting stuff like contagious diseases) is to exclude then. You need a parent to take responsibility for the child's safety before you let them leave the site. If you cannot get hold of a parent you still hold the duty of care and have to keep the child safe ! In some cases even if the parent says they can come home - you may need to make a professional judgement about whether they are safe to go home alone and choose to take them yourself (with another member of staff) If parents will not respond and the child is unmanageable on the site you could choose to call the police - this would be another way to ensure they are kept safe .