Hi stealingfeathers.
If you mean flash for the web i think html5 already replaced it. Even adobe is killing it!
If you are planning to expand on html5 my work may help you. [url]HTML5 canvas player.]
Synfig is a very good tool for education. Let me expand on this:
It forces you to organize your layers.
You can apply mathematical functions on exported values. ( So the user can have better understanding of what is vector graphics)