Khan Academy
Khan Academy: Salutations, Valedictions, Dates, and Addresses
Commas are needed when starting or ending a letter/email, writing out dates, or writing out addresses.
Khan Academy
Khan Academy: Commas in Dialogue, Tag Ques, Direct Address & Yes or No Responses
Find and use commas to set off dialogue, in tag questions, for direct address, and for yes-and-no responses.
Grammar Tips
Using Commas With Direct Address
This resource offers a short, simple article to show how commas can be used correctly with direct address.
Sophia Learning
Sophia: Commas With Numbers, People, and Places
This lesson introduces how to use commas with numbers, people, and places.
Other
Rhl School: Commas in Direct Address
Look at examples and practice using commas correctly in sentences with nouns of direct address.