This chapter deals with the first teaching experiences that the students enrolled in the MTCS course gain before becoming computer science teachers. It presents two frameworks in which the prospective computer science teachers gain this first teaching experience: The practicum, which takes place in high school, after one or two semesters of learning the MTCS course, and a tutoring framework that can be integrated in the MTCS course. We also present activities that can be facilitated in the MTCS course, in which the students deal with and analyze teaching scenarios taken from the practicum of other prospective computer science teachers.