The District Admin Account has the ability to move a student from one school to another school within your district. Scroll down to the bottom of this page if you prefer to watch the video.
1. The student must be assigned to a teacher (they cannot be "unassigned").
2. Click "edit" next to the student name.
3. In the School drop down, select the new school.
4. In the teacher drop down, select the new teacher and click Save.