please do not make this into a movie! At least not until you've actually put some time into it

Your set was not very good. There is no depth to the school, now maybe that's the effect you are going for, but still, no one would be able to tell that it is a school except for the bell, and sound effects do not make up for visuals. I can also tell that you did it on your desk with a blue piece of bristol board behind it. You should make the viewer feel as though they are in the world of your film, and not in your bedroom, in the last shot this is clearly the case especially.

Also, you've got some decent animation happening, over half of your preview were still shots. The bell should ring the second the video is played and the kids come out of school. Don't leave your character just standing their either, animate his/her head,arms,whatever, put some "character" into your character!

Looks good. Look forward to seeing the rest

Nice work so far.