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Interesting. It seems that gridding and chunking would better generalize when students start taking algebra and multiplying x+1 and 3x-5 instead of 11 and 25.
by orangecat 16y ago
Interesting. It seems that gridding and chunking would better generalize when students start taking algebra and multiplying x+1 and 3x-5 instead of 11 and 25.
- patio11 16y agoGridding is indeed very similar to concepts you'll learn in geometry or algebra, such as FOIL for evaluating the product of expressions. Here, I whipped up a geometric explanation for gridding. This would be taught after you've demonstrated with counting blocks that multiplication is fast addition of rows in a rectangle, i.e., that multiplication is the calculation of area. http://images1.bingocardcreator.com/blog-images/hn/multiplication-is-calculation-of-area.png http://images1.bingocardcreator.com/blog-images/hn/multiplic... You can teach this to third graders very easily. (Well, if you are a third grade teacher who understands how to calculate the area of a 5x6 rectangle. That is, sadly, not universal.)
- michael_dorfman 16y agoPatrick: Have you ever considered creating additional products (e.g., teaching aids like this graphic) aimed at your primary BCC market? You obviously know how to reach this market, and what kinds of things they need.
- patio11 16y agoI'm very good at getting to them when they're looking for bingo, but not very good at reaching them otherwise. Also, candidly speaking, after four years I'm sort of ready for an audience with new challenges and, ahem, a higher dollars-to-crisis ratio.