San José State University
Possessive Apostrophes
A great review of possesive nouns and how to add apostrophes. Clearly demonstrating where to place the apostrophe for different nouns, the resource also notes some tricky exceptions. Reinforce the concept with a little practice putting...
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!
Soft Schools
Soft Schools: Possesives Examples
Resource provides an explanation and examples of possessive nouns.
English Plus+
Grammar Slammer's Apostrophes Showing Possession
This site discusses the correct and incorrect usage of apostrophes to show possession and examples are provided. Note that links are provided at the bottom of the page for other specific uses of the apostrophe.