Grammar Checker!

http://www.grammarly.com/
Grammarly is an automated proofreader. When you put your writing in a box and click
"check your text", it automatically shows you the grammatical mistakes, suggests
better word choices with context-optimized suggestions, and helps avoid plagiarism
by checking your texts over 8 billion documents.
Unfortunately, this site requires membership, but you can still use it for seven days free trial.

www.paperrater.com

Paperrater claims to be the most powerful writing tool on the internet.  The best part is that it is free.  It's  developed and maintained by linguistics professionals and graduate students. And PaperRater.com is used by schools and universities in over 46 countries to help students improve their writing with a grammar and spelling check, Plagiarism Detection, Style and word choice analysis, readability statistics and a vocabulary builder tool.

Grammar rules of English in an alphabetical order

Every ESL teacher has to teach grammar, even if that is not one of your course names. This site lists the grammar rules of English alphabetically, and they are easily accessible. Not only that, they provide PDF files of lessons on these rules that you can use with your students.

Link: http://www.englishgrammar.org/

Learn English step by step!

This is a cool website for ESL learners to learn English online. There are seven levels of instruction: blue, red, yellow, green, purple, orange, and violet. Each level consists of about 30 grammar points with video instructions as well as around twenty quizes. Learners can follow the lesson step by step.

Link: http://www.learnamericanenglishonline.com

Teaching tense & aspect with animations!

The purpose of this site is to help support ESL students to be successful in studying English tenses & aspects. The animations provided from this site can be unbelievably useful in teaching verb tenses with a lot of fun.

Link: http://www.englishtenses.com/

All Kinds of Worksheets

Membership required, but still can get some worksheet for free, and very useful.

Honestly, for the worksheet that required membership, even though it was covered with a "preview" sign, the sign was so small, I could see what it was about QUITE CLEARLY!!!! :))))))))))))))))))))))))

I actually used some of them in my grammar lesson plan(Pronoun part).

 

superteacherworksheets.com

 

Useful Videoclips for Grammar!

http://www.schooltube.com/search/?term=schoolhouse+rock+grammar

Schooltube.com offers various kinds of songs introducing many grammatical items such as verbs, conjunctions, interjections, adjectives, etc. These video clips are fun and easy to follow, so it might be very helpful for warmup or ice-breakers of lesson.

Here Comes a Grammar-Monster

Grammar-monster.com
 
This site offers all kinds of free grammar lessons and tests. It consists of punctuation lessons, the 8 parts of speech, miscellaneous, easily confused words, daily grammar tip and glossary of terms.

grammar-monster.com