To delete a teacher from a chart:
1) Click the Invite tab.
2) Then delete a teacher from there.
To delete a teacher from a chart schedule page:
1) Click on a chart.
2) Switch to Classes button.
3) Click on class you want to assign a new teacher to. Un-assign an old teacher account:
4) Assign a new teacher by adding his/her email address. Then click Submit button.
Note! When you remove a teacher from a chart, he/she will still be getting the alert reminders if he/she is assigned at least to one class of this chart.
To completely un-assign a teacher from receiving the email reminders, he/she must be removed from both a chart and a chart schedule pages.