Click on the following links. Please note these will open in a new window.

http://public.wsu.edu/~brians/errors/errors.html
This site lists common errors in English and shows how to correct them.  Students who can't remember when to write "principle" and when to write "principal" will bookmark this site.

www.bartleby.com/99/
Bartlett's Familiar Quotations. 
Your best source for pithy quotations from classic literature.

www.bartleby.com/index.html
Strunk and White's The Elements of Style. 
The classic writer's handbook is reproduced online. 

http://inkspot.com/
Inkspot: The Writer's Resource. 
Includes valuable information for all genres.  Strong section on business writing.

http://www.castlecommunications.com/
Writing style, usage, and grammar guides

https://owl.english.purdue.edu/owl/section/4/16/
Purdue Owl
The Purdue University website’s OWL resources, provides links to resources for workplace writers,

http://www.martindalecenter.com/
Martindale's The Reference Desk.
This site includes links to thirty-two categories of encyclopedias and dictionaries, calculators, various translation dictionaries, and a host of resources you and your students can access directly instead of wading through search engines.

http://managementhelp.org/businesswriting/
Business Writer's Free Library.
Visit this site to find dozens of free, online business writing resources for your students.  Topics range from basic writing skills to business correspondence.

http://www.theofficelife.com/business-jargon-dictionary-A.html
The Ridiculous Business Jargon Dictionary
Visit this fun site to learn different buzzwords used in business primarily to impress nonprofessionals.