This professional development video from Minnesota Department of Education presents an algebra training session in action. Viewers watch Dr. Terry Wyberg, a methods professor at the University of Minnesota; discuss strategies to help teachers to elicit mathematical understanding with their students with an example of multiplying by 10. He poses the question: “Why when you multiply by 10 do you just add a zero?” Through the use of base 10 blocks, he shows his audience how to develop relational reasoning or algebraic thinking to do the arithmetic.


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