http://www.windows.ucar.edu/        This site is called Windows to the Universe – it is set up for a beginner, intermediate and advance user.  You just click and begin.  It is like a web quest almost in that you click and it takes you through exploring information.  It has science, social studies and Literature

http://pbskids.org/cyberchase/    This site is PBS – called Cyber Chase – my gifted children love it!  They can play math and science games and also go on quests.  All educational!  There is even a spot for teachers and parents.

http://www.hhmi.org/coolscience/      I got this site off the Technology for gifted power point.  This site offers children a chance to use science and experiment with given explanations and suggestions.  Looks neat!

http://science.discovery.com/  actually any Discovery channel site is awesome for the students.   They have up to date information and experiences for your students to view. 

http://www.websudoku.com/     I know my gifted children – as well as myself- love the Sudoku puzzles!

http://www.smithsonianeducation.org/students/

*This site is sponsored by the Smithsonian and allows students to explore topics including art, science & nature, history & culture, and people & places as well as view actual objects (from flags and fossils, to sculptures and spacecrafts, to toys and tapestries) from the museums with fun and interesting explanations.

http://primary-school-lesson-plans.suite101.com/article.cfm/fibonacci_numbers

*This is a very interesting site for the students who excel in math and might be interested in exploring a mathematical challenge in understanding Fibonacci numbers.

http://www.giftedstudy.com/resources/students/games.asp

*This site from SIG (Summer Institute for Gifted) has resources for students to use including games and puzzles, eBooks, and links for interests in arts, sciences, math, and history.