Ukraine Crisis Education in Russia has some big problems, primarily funding. As the OECD overview I linked to says, "spending per student is still low, about half of the OECD average". And as you say, many rural schools have closed. I don't know for sure, but this latter fact could be associated with rural depopulation (which is obviously not to let the state off the hook in any way, if levels of education are deteriorating).
It's easy to miss the smaller communities/villages, rural and countryside areas of Russia when evaluating the educational system in Russia since most of what we see is the front view of the major cities and the illusion of national wealth that they demonstrate through that image. — Christoffer
"As of January 1, 2021, 109.3 million inhabitants lived in Russian cities, opposed to 36.9 million people living in the countryside."
https://www.statista.com/statistics/1009893/russian-urban-and-rural-population-size/
My point was about education, unbiased education as a foundation for people to be able to view their own nation's politics critically. If you get nothing but state-approved knowledge or live in a village where they shut down the school... what then? — Christoffer
So your point now is not the quality of education as measured by the widely-accepted standards of authoritative organizations such as the OECD. Your point is that Russian education doesn't allow or encourage students to be critical of the government. That's probably true, but that's not what you said. I think you built a Russophobic fantasy of ignorant subservient masses in your head and then attempted, and failed, to find academic studies proving it's true.
The best tertiary education is indeed concentrated in the major cities, and that's where all of the ministers and beaureacrats went to university. High quality education is no guarantee that students will be able to oppose the government. Those who are most loyal to the Russian government are among the best educated in the country. Your thinking on this is too simplistic.