in scotland ur in primary school from the ages of 5-6 (primary 1 / P1) to the ages of 11-12 (primary 7 / P7)
then ur at high school from the ages of 11-12 (S1) to the ages of 17-18 (S6) unless you leave in S4 or S5. i left in S5 last may so i would be in S6 if i was still in school