Secrets of the Russian Language. Orthographic Detective

You hold a treasure in your hands! But the keys, like to all real treasures, will need to be searched for… However, you will be helped by detectives, people who are excellent at investigations, face-offs, and collecting evidence… Afterwards, you will be clicking through the MOST COMPLEX CASES of spelling N and NN in the suffixes of nouns and adjectives, in participles and adverbs, as well as better understanding the Russian language teacher in the unified and separate writing of NOT with various parts of speech and distinguishing between the particles NOT and NE.

For middle and high school age.