What is a prepositional phrase? Read through the first page of your packet to give your budding grammarians a better sense of what a prepositional phrase is. Then, have them complete the two activities provided. The first asks them to underline the prepositional phrases used in a short paragraph about bears. The second activity encourages learners to add prepositional phrases to a list of sentences to make them more interesting. This is a great activity for fifth and sixth graders to do independently; younger graders might need more help.