For 3rd-grade students in Russia, E.A. Barashkova’s (Грамматика английского языка. Сборник упражнений) is a standard tool designed to accompany primary textbooks like Spotlight or Starlight .
Mastering am, is, and are in affirmative, negative, and question forms.
Expressing ownership (e.g., my, your, his or the boy's ball ).
Barashkova’s workbooks are known for a specific pedagogical flow: Grammar, A Step-By-Step Approach Homework Booklet, Grade 3
Basic rules for when to use indefinite versus definite articles.
Basic usage of can for ability and must for obligation.
Forming sentences for habits and facts, specifically focusing on the third-person singular "s" (e.g., he plays ).