SAT -Standard Assessment Test
they are done in 2nd year (age 6/7), 6th year (age 10/11) and 9th year (13/14)
I think the ages are right anyway
Hope you do well on themn but don't worry about them, other then the talks with mates about who did best nobody cares about them anyway. I had the flu and missed my Y9 Sats apart from the science one.