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
These workbooks are part of the "Harmony" UMC, primarily supporting textbooks like "To the Secrets of Our Language" (Russian) and Istomina's "Mathematics".
You can find these workbooks at major retailers like OZON or Wildberries .
Parents and educators frequently highlight the following points regarding the use of GDZ for these specific 3rd-grade workbooks: