You may download free teacher guides and free review sample versions of the student books from the GSS view/download pages.

If you decide to use the Global Systems Science materials in your classrooms, you may do so in several ways:

1. Purchase the latest 2009 Edition GSS CD-ROM as part of the hard cover Global Systems textbook by John Christensen,
   which may be available from Kendall/Hunt Publisher.
   
2. Buy the complete set of GSS materials (books and software) as a download from Lawrence Hall of Science. Students can use the materials on computer displays at school and/or at home. They have license to print 2 copies of any or all the pages of the books. See current costs or online order pages.
   
3. Buy hardcopy books. This is the most expensive option. Current costs of hard copy books may be found on the GSS PO/check order page or the online order pages.
   
4. If you have some students who can or prefer to use GSS e-books at home and some students who are not able to use GSS e-books, you can "mix and match"—get some hard copies and some some GSS CD-ROMs or licenses in proportions to suit your student population.
   

See Strategies for Computer Use with GSS.

The Global System Science program is supported by book and CD-ROM sales, license fees, and grants we successfully apply for. By paying for materials or license fees, you assure the highest quality and future availability of GSS materials.