I am going to post a couple tips...

1. To make your words line up correctly. Create your text then duplicate the layer. Hide one of the layers and on the other use the "Perspective Tool" (Gimp). Called different things in different programs. Click the text box with this tool and then line up the corners with the corners of the chalkboard. Then use the eraser to clean up the text that falls behind Bart.

2. To make it easier to read post a link to the full file like this:

[ This is what will show up visually] ( This is what it will link to)