Online Writing Lab at Purdue University
Purdue University Owl: Exercise: Apostrophes
This lesson has twenty items to test your understanding of apostrophes. Print the exercise and punctuate correctly. Answers are provided at the end of the exercise, along with an online handout on the rules for using apostrophes.
Lumen Learning
Lumen: Readability: Contractions, Acronyms, and Numbers
This lesson focuses on recognizing and demonstrating the standard uses of apostrophes including in possessives, contractions, acronyms, and numbers. It also provides a practice activity.