A guide to the usage of three prepositions: in, on, and at. These are the three that confuse ESOL students the most. This gives a list of when to use each preposition and covers basic prepositions of time and location, and also the usage of prepositions with transportation, communication, and to indicate actions in the future. Includes 25 fill-in-the-blank exercises that can be done either in class or as homework.
This includes a very easy to understand categorization of when to use each preposition, brief examples, and an exercise. There is a separate teacher's answer key with notes.