The 4th-grade curriculum specifically moves from simple observations made in earlier grades to higher-level abstractions, such as adverbs , direct speech, and complex sentence analysis.
система развивающего обучения л. в. занкова uchebnik po russkomu iazyku poliakova 4 klass uprazhnenie
Many exercises use excerpts from classic Russian literature (Pushkin, Tolstoy, etc.) to develop cultural awareness alongside technical grammar skills. such as adverbs