Chromebook refuses to go into developer mode

I have a school Chromebook. I have gotten permission from the school to dual boot linux on my Chromebook. I’ve read that some will block developer mode but I do not know what it looks like when it is. I do get to recovery mode and am able to use Ctrl+d to get to and press the button to enable developer mode. The Chromebook restarts and then asks to return to normal mode. If I try and cancel it, it goes to the same screen and if I restart it goes back to the same screen. Any help will be appreciated. My board is DRAWLAT or the device is the Ho Chromebook 11 g9 ee