This would be a great poster to hang in a classroom as part of walls that teach! Prepositions are something that may be a little abstract for students to understand, but this is a great visual representation of what they are. This could work both on visual representation and skill within language arts. Students could then make up their own poster for another type of word, such as a verb.
This would be great to have around the classroom because students can be visual learners and this shows proof of why we do things such as peer tutoring. Students are more prone to do things if they know why they're doing them.