Summer is one of the most enjoyed seasons of the year. The problem is how to find ways to be productive especially for students. For high school students, it is an excellent time to engage in internships, learn a new skill, improve on the ones they have and of course boost their chances to get into the college of their dreams. There is a new program out there called Teen MBA: It is an online summer program for students. https://www.henryharvin.com/teen-mba-course Check it out. I would also recommend, volunteering at various local non-profit programs throughout your community and possibly taking a class at the community college or if it is in your budget maybe a college course where you stay at the college and see what that is like. By participating in various programs you are showing your future colleges and employers that you have what it takes to be part of their school or workplace. Remember you can do multiple activities during the summer but, make sure that you do not wear yourself thin.
Lastly, in order to decide what to do during summers, think about what you like to do and what your future goals are. Happy summer.