[This post is part of our series, Engineering Practices in the Classroom. See prior posts: Intro, Engineering Design Process, Exploring Materials, Problems in Context, Balancing Criteria and Constraints]
“Introducing... the slipper of the century!” a seventh grader gestures towards his teammate, who starts walking down the middle of the classroom wearing one bright red slipper with a neon-yellow strap made from scrap fabric.
The student announcer continues, “We made the Stupendous Street Slipper using recycled cellulose as a base for our outsole…”

