personally i thing that the identification instrument should match the potential interventions. a lot depends on your schools vision of what gifted education is for. if you gifted classes are about creative self expression then scoring 99% in math would find some kids and miss other. some of the identified kids might be quite miserable and feel inadaquate. If you are looking for candidates for a gradeskip then nothing beats giving end of fourth grade tests to kids at the end of third grade. So much depends on who you want to find. the cheapest alternative is to ask students teachers and parents which students they think need need harder work in order to learn how to learn best wishes grinity
