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"We are pleased to provide you with the knowledge you need to effectively protect your children online. To access the FREE Parent's Tech Tutorial, developed by Symantec and iKeepSafe"

Get free online courses from the world's leading universities. This collection includes over 7300 free courses in the liberal arts and sciences. Download these audio & video courses straight to your computer or mp3 player.

"View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons. "

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reproducibles from the book. Many more resources listed and tutorials. Must see by educators who want to add more to their lessons than lectures/worksheets.