Online Writing Lab at Purdue University
Purdue University Owl: Exercise: A or An?
This Purdue University OWL (Online Writing Lab) provides practice opportunities for students to choose between the articles "a" and "an" in the context of phrases. L.11-12.1b Usage issues
Get It Write
Get It Write: Using a Comma Before "And" in a Series
This article discusses the correct use of a comma before the word "and" in a list. In addition to clear explanations and examples, there is a self-test with answers. L.11-12.1a Gram/Usage changes, L.11-12.1b Usage issues
Other
Tidewater Community College: Writing Center: Grammar Guidelines
Get a collection of self-help handouts on different parts of speech and common usage topics.
TED Talks
Ted: Ted Ed: Grammar's Great Divide: The Oxford Comma
If you read "Bob, a DJ and a clown" on a guest list, are three people coming to the party, or only one? That depends on whether you're for or against the Oxford comma- perhaps the most hotly contested punctuation mark of all time. When...
Bartleby
Bartleby.com: Reference
Site provides links to a wide variety of reference tools, including encyclopedias, dictionary, thesaurus, quotation books, and guides to English usage. L.11-12.1b Usage issues
English Club
English Club: Learn English: Grammar: Grammar Vocabulary
A glossary of twenty-three common grammar terms; a link to a vocabulary quiz over usage is provided. L.11-12.1b Usage issues