It's long been a fallacy that you can sort young kids into high or low performers. Its a self-fulfilling prophecy kind of thing. By starting so young (kindergarten!) in NYC they were creating the division out of essentially nothing.
Long ago somebody tried dividing an elementary school class into regular and advanced students. At the end of the year, the advanced students had done better. The selection was a random lottery. The difference in performance, was entirely based on expectation.
Long ago somebody tried dividing an elementary school class into regular and advanced students. At the end of the year, the advanced students had done better. The selection was a random lottery. The difference in performance, was entirely based on expectation.