http://dailygrammar.com Daily Grammar. (K-12) INTERACTIVE This site is a free service of Word Place, Inc in Utah and has e-mail messages with grammar exercises 5 days a week and a quiz on the 6th day.
http://chompchomp.com Get Bytten! (6-12) INTERACTIVE This is an interactive online grammar site The goal of the site is to cover each type of sentence error in real depth [at least 100 sentences of practice with detailed explanations for right and wrong answers]. For those folks who are wondering, the title of the site is not an adjective-noun combination meaning "little bytes of grammar." Oh, no! It is instead a subject-verb combination that means grammar study bites in the most slangy sense of the word. And grammar study does bite! But not knowing the rules will haunt people.
www.grammarnow.com. Grammar Now! (6-12) INTERACTIVE This site can answer any grammar, usage, composition or editing question you have by e-mail.
http://grammar.ccc.commnet.edu/grammar Guide to Grammar and Writing. (6-12) INTERACTIVE The Guide to Grammar and Writing is sponsored by the Capital Community College Foundation, a nonprofit 501 c-3 organization that supports scholarships, faculty development, and curriculum innovation.
www.harcourtschool.com/glossary/grammar Harcourt’s Multimedia Grammar Glossary. (1-5) INTERACTIVE This is a animated glossary site.
http://lexipedia.com Lexipedia Type in your words and this site identifies their part of speech and definitions
http://bid4papers.com/blog/spelling-grammar-punctuation-mistakes/ The Most Common Spelling, Grammar & Punctuation Mistakes 6-12
www.eduplace.com/kids/hme/k_5/proofread/index.html Power Proofreading. (2-8) INTERACTIVE This interactive site is from Houghlin Mifflin and allows your students to expand their proofreading skills. A great teaching site.
http://rhymezone.com RhymeZone. (6-12) INTERACTIVE This is by Lycos and has an online dictionary where you can type in words to find rhymes, synonyms or antonyms.
www.syvum.com Syvum INTERACTIVE This site offers quizzes, puzzles, and drills on spelling and grammar
www.visualthesaurus.com Visual Thesaurus INTERACTIVE (6-12) The Visual Thesaurus is an interactive dictionary and thesaurus with an innovative display that encourages exploration and learning. You'll understand language in an exciting new way. To understand the power of the Visual Thesaurus, you really need to see it in action.
www.visuwords.com VisuWord INTERACTIVE(6-12) An online graphic dictionary
www.webgrammar.com Web Grammar (6-12)