Thursday, June 12, 2014

Math problems of the week: rates problems in Chicago vs. 1920s algebra

I. The only rates problems in The University of Chicago Math Project Algebra:




II. A few of the rates problems in Wentworth's New School Algebra:



III. Extra Credit:

What's missing from Chicago Math are problems like the Wentworth problems above, which require you to set up a rate problem from scratch, with only a worked example to guide you, and with three different entities (time, speed, and some sort of change of state) to interrelate from multiple perspectives. When was the last time you saw a problem like this?

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