I've heard of this too. Part of the problem is taking in all special needs students to swell their $$$ take. Then there a practically zero people who know how to work in a special needs environment. Some of these kids need to be in regular classes and some shouldn't be there at all. But too often they're thrown in together and the teachers and their many untrained "helpers" are overwhelmed. Many of them have no business in teaching.
The educational system is broken. They've experimented and their meddling is destroying an educated electorate.
Public schools are little more that DNC factories - hire union members, indoctrinate students and support Democratic Party candidates.