Many college applicants are required to provide one or more letters of recommendation along with their college application. This is a tool you can leverage to make your college application more powerful. Letters of recommendation can come from a favorite teacher, a counselor, a coach or even a boss. These letters are designed to emphasize your positive attributes, outline your scholastic accomplishments and demonstrate your extracurricular passions. A successful letter of recommendation explains why you are a prime candidate for a particular college or university.