Supplementing your report with a slide show is a fun way to make a report and entertain its readers. Each slide can represent a different preposition and describe examples of its use.
To illustrate your knowledge of prepositions, draw a picture with a large number of items in it. The report can refer to the picture when illustrating examples of prepositions. For example, if you draw a pencil on a can, you can point out the use of "on" as a preposition.
Spice up your report through the use of colors. For example, you can color prepositions blue, prepositional phrases red and subordinate clauses purple. This will help the reader understand when each concept should be used.
A song, written into your report, would help readers memorize certain prepositions, especially since you can rhyme many prepositions. For example, "out" rhymes with "about," and "round" rhymes with "around."