(1)Critical Thinking: What It Is and Why It Counts (1998)
Peter Facione is the Director of the Project on Evaluating and Analyzing Reasoning and Decision-Making.
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(2) Defining Critical Thinking, (1997), a paper for National Council for Excellence in Critical Thinking.
Richard Paul is the Director of Research at the Center for Critical Thinking and Moral Critique.

(3) Ruggiero, V. (1989) Critical Thinking, Houghton-Mifflin Co.

(4) Wolcott and Lynch (2001) Helping Your Students Develop Critical Thinking Skills, Idea Paper #37, the Idea Center, Manhattan, KS. Included on their site is a Steps for Better Thinking, guide for students.

Other sites of interest:

Critical Thinking on the Web, a composite of links to all manner of critical thinking sites.

Critical Thinking in Community Colleges, an ERIC document defining critical thinking and providing strategies for teaching critical thinking.

Critical Thinking by Debbie Naquin, NVCC. This site describes critical thinking and examples of critical thinking activities.

Critical Thinking activities, an ERIC listing of critical thinking in various disciplines.

Academic Assessment at Northern Virginia Community College. A collection of links and powerpoint presentations concerning critical thinking and assessment of critical thinking.