How do you know if a Web site is appropriate for your project? It has to pass the C.R.A.A.P. test!
Currency: How up-to-date is the information?
Relevance: How does the information relate to your topic?
Authority: By whom was this content created? What credentials and/or demonstrated expertise does the author possess?
Accuracy: Is the information correct? Are there spelling or grammatical errors?
Purpose: Why was this content created? Does this information exist to educate you or to sell you something?
-- Adapted from "Evaluating Information - Applying the CRAAP Test" by the librarians at the Meriam Library at California State University, Chico.