Free grade 4 apostrophe worksheets to help your students improve their English skills! Apostrophes in grade 4 are very important when it comes to writing. Whether you are using apostrophes for contractions or apostrophes for possession, it is important for students to be taught the rules explicitly, and then to apply their knowledge. Use these free worksheets to help your students cement their understanding of apostrophes. If you need more apostrophe worksheets, check out K5learning. They have a bunch of great English worksheets to help your students improve.