"ChemMatters is an educational magazine containing fascinating articles on hot topics for teenagers. By demystifying the chemistry behind a subject—be it barbecue, perfume, or nutrition labels—our articles explain the connection between the chemistry teenagers learn in school and the world around them. ChemMatters is used by thousands of teachers across the United States as a complement to textbook."
Jonathan Bird's Blue World website is an offshoot of a PBS television series by the same name. The website offers free "webisodes" of the underwater science/adventure series online for free WITHOUT advertising - and it's all accompanied by free study guides and classroom lessons and activities based on National Science Standards (that can be tweaked for home use by families).
the Murderous Maths, Horrible Histories, Horrible Science, etc books are a UK series for kids. My kids all loved them starting around age 4 all the way up to about 10 or 12 years old. Real nonfiction concepts with all of the funny bits emphasized.
Magazines Dragonfly - Online version of the science magazine National Geographic World - Online version of the magazine Ranger Rick - Articles, games, and activities from the nature magazine Sports Illustrated for Kids Online - Online version of the popular kids' magazine Stone Soup - Online magazine for ages 8 - 13 features stories and artwork by children. Time for Kids - Online version of the magazine features current events and a news ticker.
Biomes - Free from KIDS DISCOVER - In this downloadable Spotlight, get 8 packed pages of information about the world’s major biomes. An ideal curriculum supplement, this free infopacket includes full-color photos and a 5-question assessment with answer key.