In general:
On the top menu bar, click ‘Administration’ followed by ‘School Admin’. Select the ‘People’ tab, find the user you are looking for and then click ‘Action’ and ‘Edit’ next to their name. Select the desired role from the dropdown menu and the click ‘Save Changes’.
For Subject/Department Leaders:
On the top menu bar, click ‘Administration’ followed by ‘School Admin’. Select the ‘Subjects’ tab and click ‘Edit’ next to the chosen subject. Select the user(s) from the ‘Head of Subject’ dropdown list and then click ‘Save’.
For Year Group Leaders:
On the top menu bar, click ‘Administration’ followed by ‘School Admin’. Select the ‘Year Groups’ tab and click ‘Edit’ next to the chosen year group. Select the user(s) from the ‘Head of Year’ dropdown list and then click ‘Save’.