After teaching English in Mexico, I designed this PowerPoint for my second teaching year to help my students grasp the nuances of U.S. English propositions. This PPt presents the "preposition road map" to demonstrate how to recognize the prepositional phrase structure. The map is put to use with interactive selections. At the end of the PPt presentation, the preposition project ... Illustrated Preposition Dictionary ... gives students of all ages a method to interpret, digest and ultimately demonstrate comprehension of various prepositions. I have used this presentation with students as young as 5th grade and as advanced as 12th grade. The teacher's notes are on slide 39, with the preposition lists and the student ranking form finishing out slides 40-45. Slides 39-45 are "hidden" during play of the presentation.