While "GDZ" literally means "Ready-Made Homework," educators and educational sites like Megaresheba and GDZ.ru emphasize using them as a rather than just a source for copying.
: This is widely considered the standard "test notebook" (zachetnaya tetrad). It includes 18 specific works, each with two variants, covering topics like "Vowels and Consonants," "Spelling rules (zhi-shi, cha-shcha)," and "Alphabet". gdz po tematicheskomu kontroliu russkii iazyk 2 klass
: Early introduction to nouns, verbs, and adjectives. While "GDZ" literally means "Ready-Made Homework