I have searched for ESL teaching materials and handouts constantly for the past years.
Recently, I have found some good links with many useful worksheets for my student to practice.
http://learnenglish.britishcouncil.org/en/
http://englishforeveryone.org/Topics/Writing-Practice.htm
http://www.learnenglishfeelgood.com/esl-future-perfect-tense1.html
I keep it on my blog for record.
