Often employers desire their employees to have prior work experience. An excellent way to get work experience is through internships.
Internships also give students the opportunity to learn more about a particular field, job or area.
It is often possible to find internships both locally and out of the area. The internships are primarily offered in the summer and usually include a stipend, travel money, as well as room and board. REUs give experience in research which is useful if you are planning to pursue an advanced degree in mathematics. A list of REU sites is available every January. Again, you will gain the type of experience that can be an important factor for admittance to graduate school or for future employment.