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http://www.schooltube.com/video/d6a1692b0df64a328e8f/bill%20nye%20-%20measurement Measurement Reviewhttp://www.youtube.com/watch?v=gj15UF08lUI Classification Raphttp://www.youtube.com/watch?v=6WPBA4a6NjU Classification of Organismshttp://www.youtube.com/watch?v=wgivfVM9yOQ Classification Songhttp://www.youtube.com/watch?v=dnF_UdPbJZ0 Specifically Animal Classification