The school years in England and Wales

The school years in England and Wales
In general, the cut-off point for ages is the end of August, so all children must be of a particular age on the 1st of September in order to begin class that month.
Primary Education
Infant School or Primary School
Reception, age 4 to 5
Year 1, age 5 to 6
Year 2, age 6 to 7 (KS1 National Curriculum Tests - England only)
Junior School or Primary SchoolYear 3, age 7 to 8
Year 4, age 8 to 9
Year 5, age 9 to 10
Year 6, age 10 to 11 (Eleven plus exams in some areas of England, Key Stage 2 National Curriculum Tests)
Secondary EducationMiddle School, High School or Secondary School
Year 7, old First Form, age 11 to 12
Year 8, old Second Form, age 12 to 13
Year 9, old Third Form, age 13 to 14 (Key Stage 3 National Curriculum Tests, known as SATs (Standard Assessment Tests))
Upper School or Secondary SchoolYear 10, old Fourth Form, age 14 to 15
Year 11, old Fifth Form, age 15 to 16 (old O Level examinations, modern GCSE examinations)
Upper School, Secondary School, or Sixth Form CollegeYear 12 or Lower Sixth, age 16 to 17 (AS-level examinations)
Year 13 or Upper Sixth, age 17 to 18 (A2-level examinations. Both AS-levels and A2-levels count towards A-levels .)