Yukna's Buzaar is a great place to learn ESL/EFL at university level and have fun at the same time.
A great way
to prepare for TOEFL. Telecampus also offers other online programs for
teens.
Michael Buckhoff's ESL Web Site for University Students
Are you an ESL/EFL
student who wants to improve his/her
vocabulary,
grammar,
writing, and
editing TOEFL skills?
A useful ESL website for University Students.