It's possessive. It's often followed by S's. And it's sometimes tricky when it comes to its usage. It's the apostrophe. Laura McClure gives a refresher on when to use apostrophes in writing. [3:14]

This module explains how to use apostrophes to form possessive nouns and pronouns, provides links to exercises for each new idea, and a link to a post lesson quiz.

This site offers exercises in the sometimes confusing use of plurals of possessives. In each space write "C" if correct, or "I" if incorrect. Then click on "Submit Application" for the answers.

This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.

This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.

This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.

This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.

This page focuses on the rules for the uses and misuses of the apostrophe including contractions and omissions, possessive nouns, possessive pronouns, how to write joint possession, plurals, apostrophes with surrounding punctuation, and...

In this slideshow tutorial, the punctuation topic of "the apostrophe" is reviewed. Each slide provides a different purpose for using an apostrophe.

This Purdue Online Writing Lab article explains the three uses of the apostrophe.

Learn proofreading techniques to use in checking for correct punctuation.

A brief description of the rules, usage, and examples of the "apostrophe" in English punctuation.

Literacy Education Online (or LEO) is a great place to start if you need help with your writing. The homepage is organized around kinds of problems or questions you might have concerning your writing. Find your problem, click on the...

Writing center tutorial for how to correctly use various types of punctuation, including the apostrophe in contractions, possessives, and pronouns.

Punctuation is the point of this lesson. You'll learn to put the right dots and squiggles in the appropriate places in your writing. You'll review the conventions of punctuation used in academic English. Then you will apply what you...

This learning module provides remediation with forming contractions. Practice with forming contractions from separate words is provided with through two different worksheets.