Как правильно ? at the lesson или on the lesson

have you anything shorter than this dress?

this hat is the best we have in the shop.

i have not so many penfriends as she has.

i want a suit more modern than this one.

the weather in october was as sunnier as in september.

they were as happier as we were.

1.as in england estimates put numbers or letters

2. how many minutes the lesson last in the english school

3. how many years children studying english in primary school

4. at what age children in britain complete primary school

5. does english school has a number

6. at what time in england begins a lesson