1begins,the,education,of,compulsary,five,at,children,when,to,school,primary,go. 2great,there,in,are,some,schools,britain,private, 3 children,the,aristocracy,of,go,the,grammar,to,where,schools,and,girls,do,boys,not,together.

1. Compulsory education begins at five when children go to primary school.     2. There are some private schools in Great Britain.
3.в третьем там слово не пропущено никакое? А то не складывается нормально предложение.