school grade/institute years

[alikim]

Is it right to say: "When I was a three-year student..."?

How to say it about the school? "When I was a three-year schoolboy"?

If it's country specific, I'm asking about UK.

[Tdol]

I would use a third year/year-three student.

[alikim]

But what about school? Third-year schoolboy?

[bhaisahab]

But what about school? Third-year schoolboy?

"Student" is OK for school too, or you could say "third-year pupil".