Frequently used in Belarus. You can find digital materials and electronic supplements through official educational portals.
The most common series in Russia. Solutions often cover the textbook parts 1 and 2 as well as the workbook (Arbeitsbuch). skachat reshebnik nemetskogo iazyka 4 klassa
These sites host scanned pages of workbooks and textbook answers for almost every 4th-grade German author. Frequently used in Belarus
If you are struggling with pronunciation, check for the "Audio-CD" or MP3 tracks that accompany the Bim or Averin textbooks; they are often available for free on publisher websites. skachat reshebnik nemetskogo iazyka 4 klassa
A modern series for schools with an emphasis on the German language. Where to Find Solutions (Reshebniki)
A resource focused on German language learners that often provides links to textbook PDFs and supporting literature.