I have just begun implementing a simple version of critical thinking into my curriculum. I use the critiques of assigned design projects to try and get students, (and myself), to approach a viewpoint by looking through a different window of analysis. The window may be one of economics, or it may be the window of manufacturing processes or politics etc. It may also be the window of the end user. Most of what I use is based on Bloom's Taxonomy. Bloom and his colleagues (1956) produced one of the most often cited documents in establishing educational outcomes: The Taxonomy of the Cognitive Domain. They proposed that knowing is actually composed of six successive levels arranged in a hierarchy: Knowledge, Comprehension, Application, Analysis, Synthesis, Evaluation. Research over the past 40 years has generally confirmed that the first four levels are indeed a true hierarchy. That is, knowing at the knowledge level is easier than, the level of comprehension and so forth up to the level of analysis. However, research is mixed on the relationship of synthesis and evaluation; it is possible that these two are reversed or they could be two separate, though equally difficult, activities (Seddon, 1978). I find many of my students come with preconceived notions or "correct thoughts" about many things and do not have any reasoning behind what they say except possibly their own limited life experience and scope. Any thoughts,imput or experience you have had in this regard would be appreciated. Take care, Andrew LeRoy