An organization administrator can do it by following these instructions:

1. In the Organization page, under "Members", click the option button at the right of the teacher and select "Edit Role";
2. In the "Edit User Role" popup, unselect the "Teacher" role from the user, and the popup will ask you to transfer the data to another teacher;
3. Search for the name of the new teacher, select it then click save;
4. The data is now transfered to the new teacher.