If you finish Barashkova and want more, these world-class resources offer free exercises and explanations:
Interactive grammar lessons for A1–C1 levels. If you finish Barashkova and want more, these
Offers downloadable PDFs and online multiple-choice exercises. Grammar | LearnEnglish - British Council If you finish Barashkova and want more, these
Many educator groups share these PDFs directly. You can find links to the 6th-grade exercise books and testing materials through community posts. If you finish Barashkova and want more, these
A reliable archive for Russian textbooks. You can find the 5–6 Parent's Book and the Spotlight 5 Exercise Collection here in PDF format.
Great for learning grammar through short videos and podcasts.
You can find various parts of the Barashkova grammar series—including the (Exercise Book) and the Kniga dlya Roditelei (Parent's Book)—on several educational resource sites: