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  1. Added Oct 18, 2008 by jinsilmock
    "The Independence Hall Association (IHA) in Philadelphia has released a free digital American history textbook for middle- and high-school students, which will evolve to include interactive displays, video streaming, simulations or dynamic versions of the text, and opportunities for collaboration by students and teachers"
  2. Added Oct 08, 2007 by schwangr
    This site provides a free physics textbook. The book is written for the curious: it is entertaining, surprising and challenging on every page. With little mathematics, starting from observations of everyday life, the text explores the most fascinating parts of mechanics, thermodynamics,...
  3. Added Apr 01, 2007 by aseldow and 1 other
    This is a calculus textbook at the college Freshman level based on Abraham Robinson's infinitesimals, which date from 1960. Robinson's modern infinitesimal approach puts the intuitive ideas of the founders of the calculus on a mathematically sound footing, and is easier for beginners to understand than the more common approach via limits.
  4. Added Feb 23, 2007 by pham
    "First-generation Electronic Computers (1937-1953)" This is the second chapter of a textbook I wrote and used to teach computer science at the Prospect Hill Academy Charter School. It covers the development of binary math through the cryptographic machines of WWII and into ENIAC and the UNIVAC.
  5. Added Feb 23, 2007 by pham and 1 other
    "Up to and Including the Mechanical Generation." This is the first chapter of a textbook I wrote and used to teach computer science at the Prospect Hill Academy Charter School.
  6. Added Sep 16, 2006 by aseldow
    The Web overview module/book is pretty well-written. These are great for your students because they're web-based and FREE!
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