Prepositions and Phrasal Verbs - Offers interactive exercises to help learn how to use prepositions. Includes time, direction, location, and position. - http://www.englishpage.com/prepositions/prepositions.html
Sentence Builder: Prepositions - Provides a list of prepositions. - http://www2.actden.com/writ_den/tips/sentence/preposit.htm
Better English: Prepositions - Choose the correct preposition for each question in this quiz. - http://www.better-english.com/grammar/prepositions.htm
ESL Quiz: Prepositions - Quick quiz about prepositions. - http://a4esl.org/q/h/fb-bd-preposition.html
Exploring Prepositions - Brief description of English prepositions. - http://www.shared-visions.com/explore/english/prepos.html
Prepositions - Recommendations for which one to use after particular words. - http://www.stage-door.org/stampact/preps.html