iPad 2 for RN school? Worth the investment? q

My wife is starting nursing school next month and I'd like to get her an iPad 2 Keyboards
for this purpose.

For anyone with experience with note taking apps, or anything specific to nursing education programs: what are the best apps for note taking and/or medical reference apps?

She will be taking the iPad to school but not use any sort of laptop, only the imac at home in conjunction. I've got apps sch as Evernote but what else is there that would would for her needs?