New experience, just did about 16 hrs worth of flying on ForeFlight with Jepp subscription and was amazed what it can do when loaded properly. Loved every minute.
Otherwise have been using FD Pro X since 4 years and it is a really nice tool. I am saying that as a huge fan of a different charting product BTW.
The issue is the cost, when all you really need is a chart viewer. Consider this:
+ DropBox or similar cloud storage provided by the organizational.
+ PDF library updated by the back office team.
+ GoodReader with 'Download only' sync for the students
+ pilots makes a screenshot of the individual charts for the exercise, rotate, markup in the Gallery APP is easy. That's the chart clip.
+ use the spare cash for other training or operational tools, such as ANR headsets, LOL insurance, world-wide 4G modems for flightdeck.
Rough? Maybe. You get what you need for and not gazillion of features mostly designed to sell you solutions for problems you don't have.
Where I come from the SIM session has printed handouts with pre-selected chart sheets, only the ones you'd need. Zoomed to A4 and stapled together. Nothing beats that for training unless you are mandated to train EFB use itself.