The T.G. Ramzaeva (Т. Г. Рамзаева) 3rd-grade Russian language textbook is a classic educational resource widely used in primary schools. It is currently published by in two parts and is designed to build foundational grammar and speech skills.
If you are looking for specific exercise answers or digital versions:
Identifying subjects and predicates and understanding how words connect within a sentence. Exercise Types
Parsing words by their components (root, suffix, etc.) or performing sound-letter (phonetic) analysis.
Available through the Prosveshcheniye Media Library .