What does your teen want to accomplish with their summer job? Why are they choosing that specific job? What do they hope to get out of it by the time school starts again? By having goals in mind each day, your teen can not only have a better focus, but also take advantage of everything the job has to offer.
For example, if your student wants to learn how to be a better leader, they may make it a goal to take on more responsibility when the chance arises or to work closely with their manager to see how they keep people working towards a unified goal.