Guide to Grammar and Writing - Contains scores of digital handouts on grammar and English usage, computer-graded quizzes, and recommendations on writing in various issues. [Acrobat Reader, sound card, and PowerPoint recommended but not required.] - http://grammar.ccc.commnet.edu/grammar/
Grammar King - Offers basic information about English grammar through quizzes, rules, puzzling words and other online resources. - http://www.grammarking.com/
How to Use Articles (a/an/the) - Explains how to use definite and indefinite articles. Includes count and non-count nouns, geographical usage, 'a' versus 'an', and when not to use them. - http://owl.english.purdue.edu/owl/resource/540/01
AniGrammar - Using graphics, quizzes and activities to teach about capitals, contractions, and nouns - http://www.mcwdn.org/grammar/anigrammar.html
English Grammar - Describes the different parts of a sentence and provides examples of correct and incorrect usage. - http://www.iscribe.org/english/
English Grammar from ThinkQuest - Includes various chosen topics with explanations and examples. - http://library.thinkquest.org/10679/english/eng_main.html
Grammar Glamour - Middle school students offer an overview of the parts of speech and basic rules. - http://library.thinkquest.org/2947/
Daily Grammar - A series of free, on-line grammar lessons covers all the parts of speech, as well as punctuation. - http://www.dailygrammar.com/
Commonly Misused Words - Explains the difference between similar words with different meanings. [Adobe PDF file.] - http://www.sourceaid.com/reference/pdf/misused-words.pdf
Schoolhouse Rock: Grammar Rock - Offers lyrics to songs that aid with grammar and parts of speech. - http://www.postdiluvian.org/~gilly/Schoolhouse_Rock/HTML/grammar/grammar.html
Grammar Bytes - An index of terms, rules, interactive exercises, and handouts for students and teachers. - http://www.chompchomp.com/
Education Place English - Focuses on grammar usage through game quizzes aimed at the correct grade level. - http://www.eduplace.com/kids/hme/6_8/index.html
Stufun: Grammar - Provides grammar, dictionary, similar sounding words, and interactive exercises. - http://www.stufun.com/
The English Department's SGU - Includes "Ten Most Wanted" grammar errors, profiles and quizzes, glossary of terms, and links. - http://ace.acadiau.ca/english/grammar/intro.htm
Grammar: Parts of Speech - Free video-enhanced course includes example sentences and quizzes. [RealPlayer or Windows Media plug-in] - http://eslus.com/LESSONS/GRAMMAR/POS/pos.htm
Beginner's Tense Tests - English practice for beginning level students with quizzes. Answers available under arrows. - http://esl.about.com/library/beginner/bl_beginner_tense_test1.htm
Interactive Quizzes - A collection of interactive multiple choice grammar and reading quizzes. - http://www.cityu.edu.hk/elc/iowa/quiz/
Sentence Builder - Has helpful tips on parts of sentences. - http://www2.actden.com/writ_den/tips/sentence/
The Plural Girls - Fun game teaches pluralization. Help the cats find their way through the world of 'S' in a multiple choice and fill in the blanks games. - http://www.funbrain.com/plurals/
Rats - Features a game of adjectives and adverbs. [Requires shockwave plugin] - http://www.learningplanet.com/act/rats/rats3.htm
Grammar Gorillas - These animals need help identifying parts of speech. - http://www.funbrain.com/grammar/