Source book:
Stalinist values by David hoffmann.
Other parts of the chapter basically says the time and energy wasted on individualist bourgeois bustin decadence is time better spent learning to work for the better of the collective.
TL:DR - Nutting is counter-revolutionary. :volcel-vanguard: .
You mentioned schools for the deaf and I stumbled on this thread here on the topic
I looked at my source again and it seems I misremembered - it wasn’t that the progress for the disabled was all reversed, it was that one of the pioneers in the field of special education (I. A. Sokolyansky) was arrested in the Great Purge and his school was shut down, but when he was released in 1940 he was able to go to Moscow and get a new job doing the same thing at a different university so clearly it wasn’t a universal thing.