Exceptionally gifted children: long-term outcomes of acceleration (2006) [pdf]
A friend of mine who is a teacher pointed out to me that “highly gifted” children were actually special needs children. She used this term because she worked in a highly competitive district where parents were constantly harassing her to consider their children “highly gifted”. Once she used this term, it became easier for parents to accept that their children were doing fine in “normal” class, which was quite good anyways because of the average aptitude of the students.