No Flash on the Apple i-Pad and no Java on Google's Chromebook is a problem when producing and using Open Educational Resources (OER).
I had prepared a Screencast-o-matic video for a virtual lesson to find that this did not work on my Chromebook. As part of the same course, I used some Flash-driven fractal modeling sites - this does not work on the i-Pad.
These issues are not just to do with these two machines since the same compatibility problems are faced with different mobiles, but it is serious if you adopt a free Bring Your Own Technology (BYOT) approach at school. It forces OER producers and users to restrict themselves to no Flash and no Java if we want to be universally compatible. #change11