Another study compared several groups of students; each group being randomly formed. Then groups were labeled as 1. Gifted and Talented; 2. Normal; 3. Underachievers. Teachers were randomly selected, given a class, and told which type of class they had; i.e. 1,2 or 3.
In a few months their academic achievement was analyzed. Those labeled as Gifted achieved much higher than the other two groupings; Group 2 students scored much higher than Group 3 students.
Maybe schools could save money by training teachers to treat every student as Gifted and Talented?