My son has been "above average" ever since he started school.
In the year 2 tests he scored 3's in everything, the average score was 2s
At the end of year 6, he scored level 5s on everything, the average was level 4.
He's now coming to the end of year 8 and his scores are:
English : 6A2 (target 6B1)
Maths: 6B2 (target 6B1)
Science: 6C1 (target 6B1)
Should I be concerned? to be fair I have no idea what the B/1/2 stuff means but the actual report does say he isn't reaching his targets in some subjects.