Picture of How to Use Motion Tweens in Flash CS5
Tween - (noun) - A word used to describe a person who is neither a young child nor an adolescent, one of an age in the range of 8 to 12 years old or a similar range (thank you Wikipedia).
Tween - (verb) - To generate intermediate frames in an animated sequence so as to give the appearance of smooth movement (also thank you Wikipedia)

So Sherlock, can you guess what kind of tween we're going to be talking about today? If yes, then congratulations, though I wouldn't get too excited, even my cat could figure that out. If no, then I have a query for you: How did you even boot up your computer?

Okay, okay, all mockery and abuse aside, I can admit that definition was a bit cryptic. what a motion tween, or inbetween is, are frames that are generated by moving, scaling, and rotating (or other, those are just the most common) a shape to create an animation. You know that frustrating feeling you have when all you want to do is animate a car driving by, but you have the draw is frame by frame, just to get the dang thing to slide from one place to another? That's what motion tweens are here to fix, just draw your thing, make it a shape, mess around with it, and you got yourself an animation, huzzah!
So I hope this Instructable serves you well in your journey to becoming an esteemed animator. Don't get frustrated and give up, if my words don't make sense to you, I won't go cry if you watch or read other tutorials (actually, do that, it can't hurt). But enough blah, blah, blah, ONWARD TO STEP ONE!!  

Mr. Noack2 years ago
Well done! Way to get Featured!
Nikkisaurus (author)  Mr. Noack2 years ago
And on the front page too! :)
adorable. Also excellent instructions :D
Nikkisaurus (author)  jessyratfink2 years ago
Thank you very much, I don't often get a chance to revel in my adorableness :)
Tomdf2 years ago
HA! The best tutorial illustrations I've seen!
Where is the convert to symbol option again? Jk.
Nikkisaurus (author)  Tomdf2 years ago
Haha, thank you! I love to just doodle in the margins of everything, I'm glad you appreciate it, :)
Ez-Kabob2 years ago
This is brilliant!
Nikkisaurus (author)  Ez-Kabob2 years ago
Ohh yooouuu :) That's very kind.