When I applied for the academic discount I read that I needed provide a copy of a valid teacher/student ID, and provide a valid academic e-mail address. I submitted the e-mail address only, and received my serial number within about 5 min.
Thanks Jim, as there seems to be no indication of using the email address but I do have one from my last placement so can try it.
Yes you can try it. But you have to purchase before you get the code that you submit to Adobe in order to receive your Lightroom serial number. I don't work for Adobe. This is a user-to-user forum. So you are on your own.