Two activities -- one school related and the other involves giving back to the community. A good combination. Sometimes, students or families think more is better in terms of school activities ,but the truth is how many clubs or groups can one belong to and have an active role in each. College admission officers " see" thru those resumes that have a never ending list of school based activities. What is important is the length of time a student has been a member of a club , what committees have they served on, have they chaired any committees and how many hours per week are they spending at meetings and actual club activities? Using your summers to do volunteer work is worthwhile. It is a very good learning experience, the student comes into contact with all types of people, learns to be on time and it helps develop good work habits. There are students who can not join a club or perhaps volunteer because they must work after school, on weekends and during the summer. Working is just as important as any other school or community activity in the college application process and no one would suggest to that working student " you need more activities". Two activities is what your son has selected to put his energies into, so that is what he will present on his application.