You may want to remove one or more of the Admin owners you have set for your organization. It is worth noting that you always need at least one admin owner. (If you want to know how to add admin owners, jump to Add organization owners).
To remove admin owners:
Click your name/gravatar, bottom of the left hand pane
Click on the name of your educational organization - under My Organizations, which is about halfway down the screen.
If you want to remove the admin rights of anyone in your organisation, Click the Members tab
Under Permanent Teams, Click Owners
Choose Remove on the right hand side of the name of the person whose admin rights you want to remove. (note: you must always have at least one person in this group to act as the administrator)