You can find these workbooks at major retailers like OZON or Wildberries .
Because the "Harmony" curriculum uses non-standard methods (especially in Russian grammar and math logic), parents often use GDZ sites like Gdz.ru or Euroki not just for answers, but to understand the logic the program expects from the student. You can find these workbooks at major retailers
Parents and educators frequently highlight the following points regarding the use of GDZ for these specific 3rd-grade workbooks: Critical Review of GDZ & Content The "Garmoniya"
Typically published in two parts, with soft covers and around 88–128 pages per part. Critical Review of GDZ & Content Overview of the Workbook Features
The "Garmoniya" (Harmony) educational system's workbooks for independent work in 3rd Grade—specifically for Russian Language (by T.V. Koreshkova) and Mathematics (by N.B. Istomina)—are highly regarded for their focus on logical thinking but are often considered challenging without teacher or GDZ (ready-made homework) support. Overview of the Workbook Features