NASA - Educators - 0 views
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Roland O'Daniel on 11 Aug 09Anything from NASA will be slick. I'm a little disappointed in the videos about proportion. A 2 minute video and the mathematics is washed over in 13 seconds, and on top of that it's all procedural in nature (cross-multiply) with no explanation as to why it works. Other resources look more promising to me, but hope NASA looks into doing a better job of incorporating more conceptual development/understanding/explanation.