One of the best ways to teach plate tectonics is with picture notes. The teachers draws, the students draw, and everyone understands. One site that I have found that has great picture notes for plate tectonics is:
Click on plate tectonics guidebook in the text underneath the picture. Drawing pictures to teach plate boundaries and subsequent landforms is the easiest way I know to get the content across. I used to draw these on my white board while I discussed each picture. I have since gone to a powerpoint but I don't think it has the same effect as drawing them by hand. Your students will understand plate boundaries much easier if you try it this way.
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