In the UK:
* Primary School = 5 to 10
* Secondary School = 11 to 16 (GCSEs - basic qualifications you get before being allowed to work)
* 6th Form = 16 to 18 (A Levels - higher qualifications that are optional. These are attached to secondary schools)
* College = Offers a range of courses, from low-"worth" specialist courses, to A Levels, to HNDs (half-degree)
* University = Offers HND, Degree, Masters, Doctorate, etc.