I strongly believe in the importance of communicating with the site supervisor in order to find a fulfilling and rewarding internship. Communication is the key to finding a good fit in the placement and in fulfilling everyone is goals and needs. Students become tutors for various reasons and choose the sites for those various reasons, but many supervisors have reasons of their own.
The first thing to do is to decide, if you haven't already, why you became a tutor. The second thing is to decide what type of atmosphere you want to work in, how many children you want to work with, and what age group. When you find a placement it is in your best interest to convey this information directly to the supervisor. This will prevent any miscommunication from the beginning. It sounds simple, but this can be a very intimidating thing to do. Remember that you are dedicating yourself along with your time and you need to get what you desire out of the experience. It is a whole lot easier to clarify expectations in the beginning of the internship than at the end.
The internship agreement is a good way to open the lines of communication with your supervisor. Be sure to fill this out together and have a good idea of what you expect going into the meeting. It's all right to find that the site or supervisor doesn't meet your needs. If you feel uncomfortable with the internship, discuss it with that person and then decide if that is the best place for you to gain the experience you desire. Don't be afraid to experience something new, but remember that you are going to be spending a lot of time in your placement and that you should feel comfortable with the environment. In addition, many of you will look to your supervisor as a mentor, so take it seriously in the beginning and you will be rewarded in the end.