: Includes more advanced problem-solving intended to prepare students for final exams.
: Most didactic materials by Ershova and Goloborodko contain six variants for every independent or control work, and the GDZ typically provides answers and step-by-step solutions for all of them. : Includes more advanced problem-solving intended to prepare
: The materials span key geometric concepts across grade levels: : Includes more advanced problem-solving intended to prepare
: The GDZ is intended as a tool for self-checking rather than just copying. It helps students identify specific gaps in their logic before formal classroom testing. : Includes more advanced problem-solving intended to prepare