Here is a link to the books I have written for teachers to use within their regular classrooms, to help broaden inquiry learning topics for their gifted students. See them at the Essential Resources website, or at your local teacher resource centre.
Each book (9 in total) has between six and twelve units that address specific aspects of giftedness or topics that interest gifted students. The Teacher Notes page addresses some of the issues gifted students encounter in the classroom, and give you ideas on how to deal with them.