Kid's PageApricot Pie Particularly good for older students, this site focuses on the lives and writing of homeschooling students and homeschool graduates
MidLink Magazine An online magazine by and for middle school students ages 8 to 18. This magazine is published four times a year, has interactive sites, and accepts submissions from young writers.
Publishing Page--Young Authors Workshop (links to online magazines that accept stories, poems, or articles by young writers)
There are games, activities, simulations, and other fun stuff added to the internet every day. Here's a sampling to get you started:
EnchantedLearning.com (Printable coloring pages for all kinds of animals, maps, flags, calendars, etc.)
You can also check out the websites listed on the Science, History, Math, and Literature resource pages.