You need to be part of a school to become an administrator. If you haven't joined your school on Eedi yet, please learn how to do so here.
Once you have joined your school, follow these simple steps:
Log on to your Eedi account here
Select your initials in the top right of the page
Select Edit my Profile.
Under Permission settings, select Admin and then Update.
Your request to become admin will be sent to the current school admin, so they can verify or reject your request.