http://www.bbc.co.uk/skillswise/english

Excellent site for practicing reading, listening and other skills

owl.english.purdue.edu/owl/resource/678/01/

Covers grammar, punctuation, organization and style.

www.parapal-online.co.uk/

A variety of text/writing-based exercises

http://writefix.com/

Excellent information on paragraphing, layout and organization

http://www.listen-and-write.com/

Excellent dictation website

http://www.spreeder.com/      http://www.cueprompter.com/

Improve your reading speed with these helpful sites