Might be an interesting starting point?

http://atheistwager.blogspot.com/2007/04/first-post.html

Teaching idea development : a standards-based critical-thinking approach to writing / Sharon Crawford Hatton, Pam Leneave Ladd.
Thousand Oaks, Calif. : Corwin Press, c2002.
Call Number: LB1590.3 .H39 2002

Teaching critical thinking : reports from across the curriculum / [edited by] John H. Clarke, Arthur W. Biddle. Englewood Cliffs, N.J. : Prentice Hall, c1993.
Call Number: LB1590.3 .T4 1993

Thinking for yourself : developing critical thinking skills through writing / Marlys Mayfield.
Publisher: Belmont, Calif. : Wadsworth Pub. Co., c1991.
Call Number: PE1408 .M3933 1991

How writing shapes thinking : a study of teaching and learning / Judith A. Langer, Arthur N. Applebee.
Publisher: Urbana, Ill. : National Council of Teachers of English, c1987.
Call Number: PE1404 .L36 1987

Learning environments that encourage critical thinking promote active learning through frequent questions and provide enough support to allow students to challenge their current conceptions of knowledge and interact with other students (Browne & Freeman, 2000). 10

One important component of these efforts is an institution-specific definition that captures and operationalizes what critical thinking skills mean within the institutional learning environment. 11

CRITICAL THINKING AS A CORE ACADEMIC SKILL:
A REVIEW OF LITERATURE
Prepared by:
Office of Outcomes Assessment
University of Maryland University College
Spring 2006