Other
World Wide Words: Possessive Apostrophes
This site discusses the misuse of the apostrophe, such as using an apostrophe in a word which is a simple plural, now known as "greengrocer's apostrophe", the contraction it/it's, who's/whose, etc. A trend toward dropping the possessive...
English Plus+
Plural Possessives
This site discusses the correct and incorrect usage of apostrophes to show possession with plural nouns.
Khan Academy
Khan Academy: Advanced (Plural) Possession
Possessive plurals have a complicated relationship with apostrophes, but this exercise is here to help you understand it!
Robin L. Simmons
Grammar Bytes: The Possessive Pronoun
Printable information is provided that demonstrates how to identify a possessive pronoun in the context of a sentence.
Get It Write
Get It Write: Using the Possessive Case With Gerunds
This site gives a very clear explanation of a gerund and its noun qualities. This resource explains how to use the possessive case with a gerund. A quiz is provided to check understanding of this concept.
Other
Sandhills Community College: The Apostrophe
A valuable resource for learning about the uses of the apostrophe in English punctuation, including apostrophes with possessive nouns as well as contractions. Provides examples.
Lumen Learning
Lumen: Writing Skills: Possessives
This lesson focuses on recognizing and demonstrating the standard use of apostrophes when using both singular and plural. It also provides a practice exercise.
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.
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.
![Bellevue Community College: Apostrophes [Pdf] Handout](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Bellevue Community College: Apostrophes [Pdf] Handout")
Other
Bellevue Community College: Apostrophes [Pdf]
Resource explains the three uses of the apostrophe and provides examples. Requires Adobe Reader. [PDF]
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...
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
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...
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.
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]
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.
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.
Khan Academy
Khan Academy: Apostrophes and Plurals
Apostrophes are generally not used to form English plurals, but there are a few exceptions.
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: Ows: Apostrophe Use Exercise 1
This is a 10-question, self-grading exercise/quiz on the use of Apostrophes.