If you are interpreting in an educational setting, would it be more appropriate to stand at the front of the classroom or sit with the deaf student therefore being able to maintain eye contact and attention at all times?
When interpreting in any situation, an interpreter must be able to have eye contact at all times with the deaf client(s), and the client(s) be able to see what is happening near the speaker.
In the case of the classroom, the teacher is responsible for all the students, hearing or deaf, paying attention (which might mean some educating on your part). The interpreter can either sit near the student or at the front of the classroom as long as it allows interpreter-student eye contact and the student being able to see what the teacher is doing. For example, some interpreters in a math class (with permission from the teacher) will follow the teacher as s/he writes a problem on the board, so the students can watch both.
Of course, students of different ages have different attention spans and needs, and any vision problems would have to be considered. There is not one right or wrong answer for every situation – as is often true of interpreting, “it depends on the situation” (e.g., the age of the student, the class, communication needs of the child). The ability of the interpreter and student to have direct eye contact and the student to see what the teacher is doing during the lesson is a top priority, whether you are near the student or at the front of the classroom.