Question: what are the key stages in uk schools?
Answer: Nursery and Reception Years (3-5 years old). ... 
Key Stage 1: Years 1 to 2 (5-7 years old)
Key Stage 2: Years 3 to 6 (7-11 years old)
Key Stage 3: Years 7 to 9 (11-14 years old)
Key Stage 4: Years 10 to 11 (14-16 years old)