Last week there was a question about RubyMotion discounts for students and a few complaints about the lack of answers for student license requests:

http://news.ycombinator.com/item?id=3950369

I can confirm that today I've seen an email which offers 80% discount for students (and academic personnel). Also this is reduction is cumulative with the early bird discount, basically a student can buy a RubyMotion license for about 30$ which is not a bad deal.