The print version allows teachers to use the problem with their students without giving the students access to the archived answers.
Teachers can use the link to the archived problem to get ideas of student thinking.
Graph Zooming asks students to explore the concept of scale in mathematics and apply it to everyday experiences. Please email us. I tried this with Expedia and after typing in Swarthmore, I zoomed in until I could see the street where the Math Forum is located. I watched the scale. It's really cool, because you can zoom out to miles, and zoom in to yards.