Could you please clarify which you want to focus on, or if you'd like a general overview of the most popular textbooks used in Russian schools?
of "ready-made homework" (GDZ) across all school years.
"Za klass" (for class) could refer to a few different things: (e.g., 5th grade, 9th grade, etc.).
I can certainly help you put together a feature on this topic! However, the query is a bit regarding which school year you are interested in.