Grammar
Grammar lessons, exercises, and rules for everyday use.
GrammarBank offers free English grammar lessons, exercises with answers, free worksheets, tests, EFL / ESL quizzes... Read the explanations, test your grammar skills, learn English free online.
Academic English
Australia Network offers a series of videos to prepare students for every aspect of the IELTS test.
Academic English Cafe provides help in academic writing with quizzes and model essays.
General English
On this website BBC provides grammar, vocabulary and pronunciation aids for General and Business English Language Students with videos and other activities.
On this website BBC provides games, videos and other activities to teach literacy skills to students.
AMES NSW provides an excellent online lesson preteaching vocabulary and pronunciation for transactions at a chemist.
Children
Starfall.com is a website that teaches literacy through games and other activities.