Hi Rachel!
Thank you for visiting the Moms Panel!
There are many options for purchasing theme park tickets. Currently you can order a 1-day park ticket online at http://disneyworld.disney.go.com which will cost $85 + tax. It will cost extra to have tickets shipped to you, but there is no charge if you collect your ticket from any ticket sales location of a Walt Disney World theme park. Prices are subject to change.
There are good options for purchasing tickets in the UK. Disney's Premium Tickets for 5 or 7 days; and Disney's Ultimate Tickets for 14 or 21 days. See
full details and prices.
I cannot find any special deals for UK university students, but if you call the Walt Disney Travel Company UK on freephone 0800 16 90 730, you could give them specific details about your dates of travel and they may have some special offers available.
If you have any more questions, please come back and ask - I would be happy to help you plan your vacation!