Can anyone point to public schools (or districts) that have successfully implemented a school within a school for gifted kids, or a multi-age, full-time gifted only classroom within a larger school? I'm looking for information to take to our district.

Thanks for any help you can give in helping me find resources to share with them for how to make such an idea work.

Classic meta-analysis of GT school strategies, in its entirety. Check out also the citations regarding multi-age classrooms:

https://www.austin.k12.mn.us/school...Rogers%20Lessons%20Learned%20Journal.pdf

https://isminc.com/pdf/research-free/students/3414

Skip to the "case profiles" on page 14 for examples of how it works in some schools.