education system in uk

In this text you will find general information on the education system in the UK. As there are separate education systems in England, Scotland, Wales and Northern Ireland, the actual ages etc. might vary a little.
School in the UK is compulsory between the ages of five and sixteen. Children younger than five can go to a toddler group (accompanied by a parent), playgroup or nursery school.

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The four divisions are called Key Stages – Key Stage 1 SATs are administered at the end of year 2 and Key Stage 2 SATs at the end of year 6. Students in Key Stage 3 are not given a series of exams, but are continually assessed by their teachers throughout years 7-9. Key Stage 4 ends with students taking General Certificate of Secondary Education exams (GCSEs).
In England, children ages 5-16 must be in full-time education, but the education structure begins at age 3-4 with Nursery. Children will enter primary school at age 4-5, then secondary school at age 11-12. The age of a child on 1 September determines when they need to start school.

References:

http://www.goodschoolsguide.co.uk/choosing-a-school/the-british-system
http://www.theschoolrun.com/overview-english-education-system
http://www.eschoolnews.com/2014/05/09/7-big-problems-629/