Big Huge Labs is a cool site for teachers to create various photo projects. One section,the movie poster, in particular could be used in any classroom.
The movie poster (and to the some degree the magazine cover) section allows you to create your own movie-style poster with any image.
This is an example of a 5th grade science class using earth science terminology to create a fun and dynamic looking poster on what may have been an otherwise not-so exciting term.
Everything is practically self explanatory on the site once you pick what you what to do with your digital picture.