Although in the age of mobile and tablets Flash content has become less important there still is a lot of educational material, especially games, that uses Flash.
I also used Flash to teach animation in class. Although Flash is expensive at the time I used it you could get cheap education copies and the software was less complicated.
Sandaig Primary School: Computer Club (on the Internet archive) still has some of the work we did.
I’ve just had a trip down memory lane, Littlefish Flash lists some of the things I did with Flash and also links to a pile of worksheets I made for my pupils.
Looking back I remember how exciting, for me, to be able to learn and teach about layers, frames, bitmap and vector graphics.
One of the introductory exercises we did was to use flash to trace our faces. The same technique was popular with my class using iPad apps this year.
I’ve read a lot online about the problems with Flash over the last few years. It uses too much energy for mobile and has regular security problems. Despite this and the fact it was priced out of my classroom when Adobe bought it I am a little sad that old flash content will either vanish or be hard to view in just a few years.