Scott, Johansen give Atlanta-area teachers concrete ways to make science, engineering exciting for t
Teachers from metro Atlanta's Gwinnett County test a concrete wall for quality, measuring the time it takes a signal to travel through the wall at different points. It was one of several demonstrations organized by associate professor David Scott, left, to illustrate the importance of basic math skills in his engineering research. The teachers spent the day at Georgia Tech as part of a professional development program to boost their math and science skills. (Photo by Joshua S
