Our program is called "Gifted and Talented" and the GT kids are in a classroom with all the others. I believe 2 teachers in each grade receive some special training to be the "GT Teachers". Theoretically, the kids get more complex and varied assignments as well as special projects, doing a combination of work with the general class and some on their own.
My daughter is in 4th and was one of the few actually tagged GT in kindergarten. We had varying experiences. One year, the teacher simply piled on more quantity of work with little explanation. Other teachers are better at balancing - a formidable job in my opinion. In our K-5 school, a GT teacher typically has 20-22 kids. About 6 of those will be GT, a few others will have special education or behavioral needs, some will be your typical class cutups that require 4 times the attention, and then you have a dozen or so mid-range. I honestly don't know how they manage such a diverse group.
Our GT program is mandated at the state level, so here's the link:
www.tea.state.tx.us/gted/
As you would expect, there are a TON of websites devoted to this topic, but here are just a few that I like:
Gifted & Talented Newsletter (via email)
www.familyeducation.com/email/newsletter...1-9378,00.html?diraf
GT Resource List (Learning Network)
familyeducation.com/article/0,1120,1-7953-0-2,00.html
Gifted and Talented Resources Page
www.eskimo.com/~user/kids.html