CCSSI Mathematics
An independent look at the Common Core State Standards Initiative
2012-12-10
Mathematical tools – Part 3
On the morning of June 20, 1944, two weeks after D-Day, New York high school students sitting for the Plane Geometry Regents exam were asked to do the following construction:The task posed almost 70 years ago was not difficult, but it also wasn’t rote. It required the test-taker to make connections and to solve a problem: to apply basic construction techniques to notions of similarity and its theorems. Additionally, it required visualization skills: before actually drawing the lines and arcs necessary to complete the construction, students needed to envision the final picture.