Grammarly
Grammarly Blog: Apostrophe Rules
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...
Other
Grammar quizzes.com: Possessive Nouns: Indicating Possession
A series of carts containing rules and examples of possessives including singular and plural common nouns, proper nouns, inanimate nouns, days and holidays, and numbers and letters. A fourteen-question practice exercise follows the...
English Plus+
Apostrophes With Possessives of More Than One Owner
When to use the apostrophe when more than one person shares the same item, and when similar items are owned individually by different owners. Examples are provided.
Online Writing Lab at Purdue University
Purdue University Owl: The Apostrophe
This site focuses on the three uses for apostrophes: forming possessives of nouns, forming plurals of lowercase letters, and showing omission of letters and provides examples of each.
SUNY Empire State College
Empire State College: Apostrophes
This resource looks at the three main uses of apostrophes: to take the place of deleted letters; to show possession; and to show plurals of letters, numbers, symbols, abbreviations and words used as words.
Capital Community College Foundation
Guide to Grammar and Writing: Exercise Plurals & Possessives
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.
Sophia Learning
Sophia: Apostrophes
This slideshow lesson lists the uses of apostrophes: to show possession, create contractions, and identify missing letters. It explains the rules for each of these uses and provides examples.
Quia
Quia: Singular and Plural Possessive Nouns
This matching game has students match the singular and plural possessive nouns to their plural forms while remembering the location of each pair. Java is required.
University of Calgary
University of Calgary: Parts of Speech: Plural and Possessive Nouns
A tutorial explaining the proper apostrophe use of singular and plural possessive nouns followed by a twenty-question exercise to practice this skill.
Online Writing Lab at Purdue University
Purdue University Owl: Possessive Pronoun and Apostrophe
This Purdue Online Writing Lab article explains the three uses of the apostrophe.
Capital Community College Foundation
Guide to Grammar and Writing: Plural Forms
A good explanation of Plural Forms for the student. Site also offers a quiz at the end. L.11-12.2b Spelling
Towson University
Towson University: Online Writing Support: Self Teaching Units: Apostrophes
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.
Other
Illinois State U.: Punctuation Made Simple Apostrophes
What is an apostrophe and how is it used properly in punctuation? "Punctuation Made Simple," gives some concrete examples for apostrophe use.
TED Talks
Ted: Ted Ed: When to Use Apostrophes
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]
Khan Academy
Khan Academy: Apostrophes and Contractions: Introduction to Contractions
Try these five multiple-choice questions to help review your understanding of contractions and apostrophes.
Capital Community College Foundation
Guide to Grammar and Writing: The Apostrophe
What is an apostrophe? Where are apostrophes found in writing? Use this website to learn more about these crazy little punctuation marks.
Khan Academy
Khan Academy: Meet the Apostrophe
Apostrophes have many important uses in the English language, and this exercise will give you an introduction to those uses!
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.
Quia
Quia: Singular and Plural Possessive Nouns
Flashcards offers an electronic version of flashcards to practice singular and plural possessive nouns. On the front of each card is a noun; click on the card to reveal the possessive of that noun.
University of Ottawa (Canada)
U of Ottawa Hyper Grammar: Punctuation
Writing center tutorial for how to correctly use various types of punctuation, including the apostrophe in contractions, possessives, and pronouns.
Towson University
Towson University: Ows: Apostrophe Use Exercise 1
This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.
Sophia Learning
Sophia: Apostrophes: Tutorial
In this slideshow tutorial, the punctuation topic of "the apostrophe" is reviewed. Each slide provides a different purpose for using an apostrophe.
Sophia Learning
Sophia: Apostrophe Guidelines for Possessives
This lesson explains the use of apostrophes to form possessives.
Quia
Quia: Singular and Plural Nouns
This Concentration-style has students match singular and possessive nouns with their plural forms while remembering where each of the match pairs are located. Java Script is required.