This links can help you practice pronunciation

http://www.cambridgeenglishonline.com/Phonetics_Focus/

http://www.uiowa.edu/~acadtech/phonetics/english/frameset.html

You can practice by reading story books to your kids!

http://www.starfall.com/

Here you can look for any word and listen to how it is pronounced

http://es.forvo.com/