That's quite a general subject, Фёдор. Are you asking us to tell you something? Has your teacher asked you to find out information for your homework? What do you need to know?

I suggest you do this:

1. Look this up on the internet  eg a wikipedia page on this subject. If you don't read English very well, you can look at the version in Russian. 

2. Come back here and ask us some specific questions if there's anything else you need to know or anything you don't understand.

3. Write your report or essay or whatever you need to do. Post it here on italki in Notebook, so that we can make corrections.

Does that help?

I want to learn about  school food/