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!
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
Khan Academy
Khan Academy: Apostrophes and Plurals
Apostrophes are generally not used to form English plurals, but there are a few exceptions.
Other
English Grammar 101: Possessive Nouns
Online grammar lesson gives an explanation of possessive nouns with follow-up practice exercises. Immediate feedback is provided.
![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]
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!
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.