Although geared for K-12 students, this material looks pretty good for anybody interested in thinking about technology in general. We think about particular technologies (like computers, automobiles, nanotechnology) all the time, but it's important to be able to think about technology in general.
From their website (http://www.knowledgecontext.org/):
Technology, broadly speaking, pervades every part of our lives. While technologies emerge and change over history — from the simple wheel to the printing press to the personal computer — technology itself remains a constant. So whether or not a child chooses to become a technologist, he or she won't be able to thrive in society without an understanding of technology.
That's where KnowledgeContext comes in. We're dedicated to giving young people the tools to place technology in its overarching context — helping them grasp what technology is, how it ties into other disciplines, how it changes, and how to evaluate it. As a result, they're prepared to make the best choices in a world where technologies change with greater and greater speed.