This deal from jemba has been improved for students.
If you're a student and a new customer or an existing upgrading customer, show you student ID and get 1GB extra data on either the $50 Red SIM Only plan and the $70 Red 12 and 24 month plans.
With the current deal, that means students get 5GB data.
On a 12 month plan the bonus data is available for the 12 months
On a month to month and 24 month plan, the bonus data is available for 24 months.
There's also a deal for an extra 2GB data for ACT & QBN students.
I can't find the link on the Vodafone website though.
*This Offer end 01.09.2015
And students also get 6 months access to Spotify Premium as a sweetener on the 12 and 24 month plans.
Student 1GB Data Bonus Details:
For personal use by approved new and upgrading students who present a valid student ID on sign-up. Offer available on Vodafone Red $70 12 & 24 month consumer phone plans and Vodafone Red $50 SIM Only month-to-month consumer plans. For 24 month and month-to-month plans, bonus data available for months 1-24; for 12 month plans, bonus data available for months 1-12. Bonus data forfeited if you cancel your contract. Min monthly spend is $50 or $70 ($50 & $70 plans respectively). For 12 & 24 month plans, early exit fee is min month spend x months left on contract plus any handset payments. For month-to-month plans, minimum connection is 1 month. Recurring monthly access fee charged until the end of the month in which you notify Vodafone that you wish to cancel. Services subject to device capabilities, network limitations & customer location. Not transferrable or redeemable for cash and not available with any other offer. Not available with bonus 2GB ACT student offer.
wish I could pass their credit check :(