| http://www.w3.org/ns/prov#value | - January 23, 2010 The Texas Education Agency (TEA) seeks ???to identify and acquire state-developed/state owned open-source textbooks that are available for downloading from the internet at no charge to a student and without requiring the purchase of an unlock code, membership, or other access or use charge, except for a charge to order an optional printed copy of all or part of the textbook.??? Th
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