Well, that means I have to change the (c) statement
Given that I am OK with education to use my material as long as it is non-profit (read: no reselling later either), I guess I'll have to make that statement explicit to avoid mistakes. Although I understand the issue and agree with the principle, I don't want to sue a school, nor would I want a kid to be in legal crosshairs for doing a school project: all that teaches them is uncertainty.
I genuinely have to think of the children here :)
Going off on a slight tangent, some people stated that they would expect the relevant data to be available in EXIF, but setups like Facebook explicitly filter out this data. Ostensibly they do that for "privacy" reasons (yes, yes, stop laughing), but as far as I can tell they do it to make tracking back copyright difficult - you could say they act in collusion with copyright violators because it would otherwise substantially harm their business as they go through literally millions of images per day.
AFAIK, under US Copyright law it is an offence (not sure criminal or civil) to mess with a copyright notice, so FB could potentially be on the hook for a LOT of money if it weren't for the escape clause that it has to be "with intent" - they'll probably get away with it once claiming it was a "programming error" because identifying copyright information in EXIF is really hard .. no, wait, there is actually an explicit "copyright" tag..