the future city competition is an example of problem-based learning with computer simulation, in stem (science, technology, engineering, and mathematics) education. the program asks 6th, 7th and 8th grade students from around the nation to team with engineer-volunteer mentors to create – first on computer and then in three-dimensional models – their visions of the city of tomorrow. a program of the discovere organization, it has been operating since 1992 and currently serves over 40,000 students.