Depending on the subject you are looking for, here are the core characteristics and sources for "proper" KIM texts: Key Characteristics of FGOS KIMs

Includes dictations, expositions, and tests focused on syntax, morphology, and punctuation. Authoritative KIMs are often compiled by N.V. Egorova .

Features thematic tests covering natural numbers, decimals, and basic geometry. L.P. Popova is a frequent compiler of these materials.

Most schools use printed collections from VAKO (Вако) or Prosveshcheniye (Просвещение) , which are available at retailers like OZON and Yandex Market.

You can access official and verified versions of these materials through these platforms: