You need to be available at least 2-3 full days per week, and preferably more, for your internship. It has been our experience that the student intern who is not a consistent employee for a large block of time does not integrate as well with the organization, does not receive the kinds of projects that they can carry to completion, does not gain exposure to the full range of activities at the site, and does not participate as fully in the strategic decision making process of the organization.
The national average is approximately 40 hours per credit (i.e. 3 credits equal about 120 hours.) The duration of the internship will depend on the number of credits you are registered for, how many days per week you are available and the needs of the organization.