To me, any tasks in the class room that are beneficial to my students are given the most importance. All other activities can wait.

Late enrolments are likely to miss out on the orientations unless special attention is taken to orientate them. I think the student counselor may be the best person to take up that task before the late commer is sent to the class.Ofcourse, the teacher can reinforce on the policies once the student is in the class.