What is the difference between schools in britain and ukraine?в чем разница

Britain:
3 semesters
compulsary education 11 years
pre-school - from the age of 3 till 5
primary school from 5 till 11
secondary school from 11 till 16
core subjects : 3 
exams GCSE in 16 years 
A-level exams in 18 

Ukrain"
4 terms
compulsary education 11 years
pre-school- children go to kindergarden from 3 till 6 or 7
primary school 7 till 11
secondary school till 16
core subjects : ALL
exams: 1st national exam in 16
EGE in 18