I was studying for my chemistry class when I got the sudden urge to see how difficult it would be to redesign just a few slides from a recent deck on Acids, Bases, pH, etc.
pH Lecture Original
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pH Lecture Makeover
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Altogether, this took around 20 minutes to recreate the 2 slides (which then became 5).
I began searching for images on iStockPhoto.com but then realized I should try looking in Flickr's Creative Commons library. It was so easy! If I have more time, I will continue to do mini-makeovers of my lecture slides or other presentations I come across.