>>I was once a CIS major, before I moved to math & statistics, and our first year we had a 2-semester required course called 'Discrete Structures', kind of a meaningless name, but it was full of Logic, Number Theory, Algorithmic Theory, Design Theory, and other goodies that were extremely useful in both CS and math...maybe the best course I ever had in my educational process...
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>One of my favorite courses in school was the advanced philosophy course called simply "Logic". It broke down what many take for granted, and forced you to think about the realtionship of different truths- and how you could or could not derive one truth from another. Many times what I learned in that class helped me to greatly simplify an overly complex IF/THEN/ELSE structure.

This is the type of class that I wish was a requirement in High School. I've done and have seen way too many reports (both VFP and TV) where people come to some conclusion based on what they think the numbers mean. They make these great leaps in logic that just don't jive with what was really being stated. I've gotten in the habit, when I have to create a report of some sort, of creating a .DOC file that explains what the numbers are showing, what assumptions they can and can't make based on them.

One area that was helpful for me was when I was taking a Digital Logic electronics class. Learning boolean algebra and (especially) logic tables has come in handy a few times.