Any evidence of these? What are these same-classroom alternatives? How are these worse for ungifted students? How do they not assess intellectual ability? Many

Any evidence of these? What are these same-classroom alternatives? How are these worse for ungifted students? How do they not assess intellectual ability? Many of the gifted programs I've heard of do IQ testing, which isn't a perfect metric but is at least trying to assess intellectual ability. In any case, that's an argument for a better measure of intellectual ability not eliminating gifted programs. What is the shiny new alternative?