Many teachers use Legos in the classroom for hands-on STEM exercises, particularly as an enticement to get students who are less confident about their engineering aptitude to give it a try. Middle-school robotics teacher Ian Chow-Miller says he likes using Legos -- from the basic blocks to the higher-end robotics kits -- because his students learn something from every possible outcome. A Marketplace story from National Public Radio highlights some of the projects the class has tried, including videos.