After a lesson on what interjections are and how they are used, play a light-hearted game of Interjection Bingo. Brainstorm a list together with an upper-grade elementary class of all the interjections your students can think of. Pass out a Bingo grid or have the students make their own with paper and pencil. Give each student a good amount of chips. Have the students write the interjection words on the blank squares of the Bingo grid in any order. While they are filling in their Bingo cards, you can write each interjection on a blank index card. To begin play, act out the facial expression and emotion that goes with the interjection on the index card. Have students guess what the word might be. Students place a chip on that interjection word on their grid once they guess the word correctly. Play continues until one student has five chips in a row.
Have your third- through fifth-grade students write their own comedy routine using only interjections. Divide the class into partnerships. Have them invent a scenario for their characters. Instruct them to use only interjections for their script. Arrange for each team to perform its play in front of the class. Have the class guess what might be happening in each play.
Give your upper-elementary students the chance to think outside of the box. Pass out a typical worksheet on interjections. Instruct them to create their own interjections rather than using the typical, such as using "Great green beans!" or "Jumping Wolves!" Have students determine whether an exclamation point is appropriate or if a comma is best to punctuate the interjection. Read some creative samples aloud to the class.
Write a short story using interjections throughout. Read the story aloud to your class. Instruct your students to stand up whenever they hear an interjection being used. Invite them to write their own story using interjections.