Dr. Alan M. Selby from St. Laurent, Quebec recently sent information about a web site. At this time I am unable to log into the Web, so I can't attest to interest, clarity, or appropriateness for the populations Dr. Selby mentions.
He writes-- I am a mathematician who taught several years in colleges (the slightly stressful, itinerant scholar route) before taking employment with an electrical engineering firm. I left the post in March 1994, to continue exploring and expressing ideas on and for education in math, reason and science. The result was three books, completed in August 1994.
From the books, the educational web site http://www.cam.org/~aselby/lesson.html offers some original ideas on and for education in math, reason, and critical thinking and for learning in general. Freshman college students, high school students and their teachers could be directed to this site for different but clear perspectives on (i) deductive reasoning and on (ii) mathematics from arithmetic to calculus. ...email@example.com