Two science teachers who had teaching experience of more than 10 years conducted these lessons. Each teacher taught two classes. The lessons were conducted during the first semester and were about magnetism, electricity, and electrical energy. The electricity energy concept had been introduced to students the previous year. These concepts were needed to understand energy concepts in the second semester. Therefore, the learning environment forced students to correlate existed knowledge and new knowledge. This learning process is one of metacognitive activity.
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).