: Material is grouped by specific rules (orthograms), such as unstressed vowels, silent consonants, and prefixes.
: Platforms like KION Stroki and Aldebaran allow you to read the material online.
: You can find descriptions and purchase options on the AST Publisher's website .
: The manual covers the entire 3rd-grade curriculum, focusing on orthography and punctuation.
If you are looking for specific rules to practice, the manual typically includes: Unstressed vowels in word roots. Spelling of prefixes and suffixes. The use of hard and soft signs (Ъ and Ь). Parts of speech: nouns, adjectives, and verbs.