Models play an important role in algebraic thinking. Here is a geometric model for (a+b)(a-b), requiring almost no word. Yes, (a+b)(a-b)=a^2+ab-ab-b^2. But a picture is appealing, too. You can use all the three pieces or just the board. I do think on needs to talk about it, though.
.1 to .2mm
STEAM educator, learning from and working with K-12 STEAM teachers to explore new ideas of teaching and engagement. I firmly believe ART is at the core of STEM learning or all human learning! I owe my ideas and designs to the hundreds of K-12 children and teachers and university professors I have had the pleasure of working with, in multiple disciplines-- math, science,engineering language arts, social studies, early childhood education and more! All mistakes, of course, are mine! There is no warranty or liability whatsoever implied or explicit behind the designs or ideas. They are all posted for their potential educational values.
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