text: A teacher is someone who has learned the ins and outs of school based learning, who went to college and received a teaching degree, and has a specialized learning in usually one or more subjects. So when it comes to designing a summer project that's goal is to continue a student's learning during the summer, a teacher is obviously the best fit for the job. For example, if a student who already knows the basics of mechanical engineering and creates a pulley system almost identical to what they did in school, they aren't really learning anything. However, if a teacher who already knows what the student has learned designs a project adding on to what they knew, like creating a vehicle or machine using a pulley system, that would force the student to uses previous knowledge to figure out how to learn something knew.