Extra Curricular Advantage

It is important that you continue your out-of-class activities such as sports, music, theatre, work, community service, and leadership activities.

Colleges want to see what interests you, and how deep that interest lies.
An in-depth focus on a limited number of activities is better than a limited focus upon a vast array of activities.
Some experience during the summer such as a career internship, extended community service, or a summer program is beneficial.