Once you have completed prepositions, conjunctions, and interjections hand out the review guide for the unit. Then move onto the prepositions, conjunctions, and interjections exam. You pick a student or a student and a partner to come up to the chalkboard. Have the students identify the preposition and its object. For conjunctions and interjects I would write a chalkboard full of simple sentences and tell the class they have to combine all the simple sentences on the board into compound and complex sentences using coordinating, subordinating, and correlative conjunctions.
Kids usually pick up on interjections rather quickly.
I suggest a brief review of the punctuation rules of interjections. You may follow up the review guide with the prepositions, conjunctions, and interjections exam. This unit will help students identify common prepositional phrases and their noun or pronoun objects, interjections, and the unit will review coordinating, subordinating, and correlative conjunctions. A prepositional phrase contains a preposition and an object. A prepositional phrase can act as an adjective and describe a noun or pronoun.