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I don’t want to be overly negative but this site is awful. Yes, it does present different techniques for finding solutions to multiplication and division problems but they are ALL procedural. With this type of presentation, I would hope that the creators could incorporate more conceptual understanding, multiple representations of concepts so that students are able to connect a visual representation to a procedure.
I wouldn’t be opposed to using this with students, but I would advocate looking for programs, sites that do a better job of marrying the ideas, especially if they are tutorials.
Thanks for your comment. Of course conceptual understanding is important. However, I wouldn’t call this site awful. That would imply that they claim that this site to be something else than it is. If they claimed this site would provide an complete “understanding” of what fractions, decimals, and percent are then this site would be awful. I think the site does an outstanding job going through procedures for solving these types of problems. Making learning procedural processes more engaging is also important. This site is what it is and I don’t believe the site or my blog post claims it’s something different.