I think that as long as you've looked carefully at "what NOT to do" then you're already leagues ahead of where most current high schools are:
- DO NOT use GT students as "unofficial Teaching Assistants" in advanced coursework and think that this means that you're serving all of the students in those courses that much better... sure, GT students in mainstreamed/integrated classrooms are "good" for other students-- but don't lose sight of the fact that someone should be doing good FOR those students, too,
- Don't buy into 'enrichment' strategies in a class intended to serve struggling and average learners as making such a class suitable for GT students. It doesn't, and putting lipstick on that pig still doesn't make it anything but a pig. Throwing GT students extra work doesn't make the class better for them, and it serves to isolate them from the rest of the class.
- differentiate MATERIALS and INSTRUCTIONAL STRATEGIES to make GT coursework truly meaningful for gifted learners. There's only so much "depth" to be had from 'basic' or basal reader selections and in basic math textbooks, if you see what I mean.
There's been a very strong trend in mixed-ability high schools toward DE-grouping by ability-- with this (IMO, misguided) notion that with good "enrichment and in-class differentiation strategies," such classrooms really CAN serve all of the learners in them-- from the struggling students with slow processing speeds to the PG students seated next to them.
That's just mind-boggling, when you consider it. There is
no way that conventional direct instruction aimed at forty kids can possibly be "appropriate" for both of those students, given their very real (and very different) needs.
If you offer instruction that is
meaningful for the one, you have come up with a solution which is meaningless and frustrating for the other.