Focus on Word Formation, Morphology (Nouns, Adjectives, Numerals), and Spelling.
Websites like InternetUrok offer video lessons if a specific rule is confusing. gdz russkomu iazyku 6 klass vilenkin
Use the specific exercise number. Most sites like GDZ.ru or Skysmart categorize by textbook and then by exercise number. 💡 Quick Study Tips for 6th Grade Focus on Word Formation