Useful websites
www.helpforenglish.cz - Help For English – Internet English for free
English-English Dictionaries:
Longman - http://www.ldoceonline.com/
Macmillan - http://www.macmillandictionary.com/ - here one can also hear noises of some words, e.g. grunt, whine, shriek, yap or purr.
Oxford - http://www.oxfordadvancedlearnersdictionary.com/
Wikipedia The Free Encyclopedia
Common Errors in English Usage
www.visuwords.com - Visuwords – Online Graphical Dictionary – key in a word and you get a visual display of that word and a series of related words
www.wordsift.com - you paste a text into the tool, it takes the most common word in your text and shows you pictures related to its meaning, you can also select another word from your text; it includes the Visual Thesaurus
www.triptico.co.uk/flashFiles/wordMagnets/WordMagnets.html - playing with word magnets
www.telescopictext.com - by clicking on different parts of the text, you can make the sentence expand to become a more complex text. You can review the process by which the final text was constructed.
Email English - free downloadable resources for English teachers: http://www.businessenglishonline.net/emailenglish/worksheets.htm
The Business Free Resources:
http://www.businessenglishonline.net/TheBusiness/resources.htm