british schooling system: people aged 4-11 are in years. 4-5: reception / foundation kids 5-6: year 1 kids 6-7: year 2 kids 7-8: year 3 kids 8-9: year 4 kids 9-10: Year 5 kids 10-11: year 6 kids (where i am) after year 6 we have secondary school which are years 7-10 so like 11 year olds - 18 year olds British schooling does not have a middle school SATS: Sats are a test that year 6 kids take near the middle of the school term (like may time bc uk school holidays start in the end of july). SATS recap what you learnt whilst being in primary school. Your results will be sent to your secondary school.
