Q: iPad mini vs iPad Air in the classroom

iPad Air vs. Retina iPad Mini: Which tablet is right for you?

http://reviews.cnet.com/8301-31747_7-57610252-243/ipad-air-vs-retina-ipad-mini-w hich-tablet-is-right-for-you/

16GB vs 32GB vs 64GB: Which new iPad storage capacity should you get?

http://www.imore.com/2012/03/08/16gb-32gb-64gb-ipad-capacity/

How much content will fit on my iPod or iPhone?

http://support.apple.com/kb/HT1867

How Much iPad Memory Do You Need?

http://ipad.about.com/od/iPad-Tutorials/a/How-Much-iPad-Memory-Do-You-Need.htm

You might consider getting a refurbished iPad for less than the regular retail price.

Buy a Refurbished iPad? The What, When, Why and How

http://www.maciverse.com/refurbished-ipad.html

Has new screen, back and battery, and 1-year warranty.

Refurbished iPads from Apple

http://store.apple.com/us/browse/home/specialdeals/ipad

 Cheers, Tom