http://www.bbc.co.uk/schools/wordsandpictures/clusters/
http://www.howjsay.com/
http://www.soundsofenglish.org/pronunciation/index.htm
http://www.englishclub.com/pronunciation/
http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/
'Tell me and I'll forget; show me and I may remember; involve me and I'll learn.'