Many thanks! I really appreciate your help. It will be even more convenient for me to discuss this topic in English.
My task is to compare modern textbooks, maybe since 90-s or 2000s.
If you are interested in, there are some survey done about the way the history of WW2 was taught in all the countries that had participated in this war.
It's the Russian translation of the book by Mark Ferro, which was originally written in French, but I think it should be also translated into English
Regarding your questions about Russian system of education:
1) There is a sort of inequality between different federal subjects in Russia concerning education policy.
Simply put, there are regions (oblasts) and national republics. Republics have much more rights to choose their policy in many aspects, including the education one.
So I will speak about how it is done in
2) Main difference between textbooks are not in publishing houses, but in the authors of teaching materials.
There are different teaching materials (Учебно-методический комплекс or УМК), which done by different authors. It consist of a textbook, a workbook, a teacher's book and some additional materials)
I'm not sure whether this situation concerns history books because I'm German and English teacher (but now I study for a Master's degree in Political science, haha) but basically there are maybe 3-4 sets of УМК for basic and the same amount for advanced learning.
The school chooses those that it prefers and students are taught using them
There was more freedom about which textbook to choose before, but now there are always some standards and just an insane amount of paperwork regarding it.
3) When I was a schoolboy, we had a textbook about Russian history and a textbook about World History (but in fact it was about European History, with an exception of Ancient Egypt and Middle East.
4) Students learn a region's history not in history classes, there is another subject which says about it.
It is unique in every region. The name of the subject is made from "a region's name + ending "ведение" like Москвоведение, Калугаведение and so on)
Also there is a lot of information given in homeroom periods (классный час = klassny chas)
For example, I am from Kaluga, and the main hero was a rocket scientist Tsiolkovsky, who lived and worked in our region.
5) Textbook are divided by level (advanced or basic) and grade.
But there are also private schools, religious schools, elite schools and I have no information how it is done there. I assume they have much more freedom
6) History lessons and textbooks are becoming much more ideologized now because of recent political events and my purpose is to track this change.
Fortunately, it's in our blood to overcome these idiotic laws, so I hope, the thins won't get much worse, haha.
Like a good teacher makes anyway a lot of materials himself with papersheets, presentations and so on.
P.S. Does it really need to make an effort to communicate in proper German? In the University I heard that only maybe about ~25% of people in German speak Hochdeutsch in everyday communication and AFAIK Bairish is quite different from Hochdeutsch
Many thanks!