1) Children usually go to school at the age of 7.
2) Children usually leave school at the age of 17.
3) No, it doesn't. In some countries the school year begins in summer.
4) The primary school pupils usually have 4 or 5 classes every day.
5) There are copybooks, books, pens, pencils, a ruler, a rubber, a sharpener and many other things in a schoolbag.
6) Yes, I do. I often play outdoors. Или No, I don't. I don't play outdoors often.
7) English is difficult for me. Maths is easy for me.