You could subscribe on the monthly plan ($30/month) for 3 months then cancel; but it is hardly cheaper than a year on the photography plan ($10/month with year commitment). Nobody, however, can BUY. Students get a limited time discount on subscription.
I work at a university and have come across this issue with staff and students alike.
if you sign up via the (non-academic/higher education) route, you'll be tied into the contract for a minimum of 12 months. Some students have successfully gotten out of their contract by joining the academic scheme, and then persuading Adobe customer service that they have two accounts (normal user and academic user) and would like to terminate their standard user account. It doesn't always work, and to be honest, Adobe change their licensing models so often, it's like hitting a moving target.
My advice is be patient and wait until you are officially a student. You'll find it a whole lot simpler.
More info. Lightroom & Photoshop (photography Plan) is $10/month for everyone. No student discount, no need to wait. Students get a discount for one year ONLY on Creative Cloud ($50 reduced to $20/month, 1 year commitment)
Thanks everyone for your answers!
Test Screen Name, I have a question: I'm from Germany, is it the same here and could you give me a link to that offer (10/month)? Because the only thing I find is "LR & PS for 11,89/month" and only for students ... and the second question: did I understand that correctly, students get the cheaper version for ONLY 1 YEAR? I thought they get it as long as they're students ...