This is an image of a checkpoint. I would utilize checkpoints as a means to motivate students to keep moving. Throughout my learning experiences I have felt satisfaction and accomplishment from completing tasks, and I think the positive reinforcement is a good way for students to feel encouraged as they move through material.
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This is a photo that I took at the McNeil power plant. I took it while on a field trip with my CDAE class. As a teacher, I would encourage field trips because I believe that memorable for students and effective ways to see subjects that are being talked about in class in action.