I agree, we want administrators to be able to set a "do not schedule with this teacher" option as well as the ability to choose the teacher before scheduling.  We really relied on this in EE.

we don't allow teachers to request certain students, but I could use this functionalithy for the Division Heads (Upper School and Middle School) to request teachers for students. I agree that the other functionality should be not to allow a specific student to hafe a certain teacher (for example a son to have his father for a teacher

This is an important feature that we used a lot in Education Edge.  It would be nice to be able to have specific teacher requests for certain students.  I agree with Cindy that I don't want students to have this ability, but I as the administrator should be able to request a specific teacher or a specific section of the course.

I don't want the option for students to be able to request a teacher but I as the person making the schedule should be able to request a specific teacher for a student as well as the ability to not allow a specific student to have a certain teacher. In Education Edge we had the ability to do both.