The problem of the lesson sequence related to real world activities, in which motors
have many functions in vehicles and other machines. The students were asked to make a
DC motor that was faster, more stable, more efficient, or cheaper. They had to decide what
kind of motor was needed. Therefore, students designed solutions based on their goal (goal
orientation is a metacognitive skill). In the design process, students must think about a
given budget to buy the parts of the DC motor and conduct several trials (like scientists and
engineers have to do).