how do school years work in the uk

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Most children start school full-time in the September after they turn 4.
Contact the local council or school to ask for your child to start later. They’ll decide if your child should start in reception year or year 1, based on what’s in the best interests of your child.

Wolsey Hall Oxford is a registered school of Cambridge Assessment International Education
Please use the table below to find the suitable level of Wolsey Hall course for your child.

References:

http://www.gov.uk/schools-admissions/school-starting-age
http://wolseyhalloxford.org.uk/south-african-school-grades/
http://www.oph.fi/en/education-system/basic-education