Homework

Call
Good: http://www.englisch-hilfen.de/en/ (Learning English Online)
Here you can find challenging tests to take in a good environment and according to the level of each student.
Bad: http://www.smic.be/smic5022/exercisesgrammar.htm(English Exercises Online)
This webpage has good exercises but doesn´t give a eye-catching presentation to children in order that they feel motivated to develop their homework.

CMC
Good: http://sharedtalk.com/ (Your language exchange network)
This is one of the best website on the net because here you can create an e-mail account,chat,voice-chat,and mainly share your interests learning a second language with lot of people around the world.
Bad: http://www.chatlanguageservices.com/
You don´t have a big amount of people to chat and several alternatives to find people with common purposes.

DRILL AND PRACTICE

Good: http://www.english-online.org.uk/ (English for everybody)
Everybody can learn english, that´s true, because of that there is a space where your purposes are pointed out to get what you want in pedagogycal terms.
Bad: http://www.englishpractice.com/newweb/html/index_home.asp (Education group)
Its a great page in terms of learning quality, however, it doesn´t have a place where children and adolescents can learn and practice english because this site is focus only on adults.