blogs in english classroom

I think in general blogs are good for your english development, but you must add other activities. In my case, the combination of English discoveries and the blog, helped me in a integral way, because with english discoveries you learn with reading, listening and choosing different options to fill out spaces on phrases and in that way you can learn grammar and spelling, but when you are writing you learn different ways of expressing and you have to manage and create ways of expressing yourself. From my point of view, with blogs you put on practice what you have learned with English discoveries and classes.
It is very important for each person to develope a good level of writing because its ussually needed, and having a blog as a part of an English course helps you develope this skills.
Other advantage is that if the time of class is not enough for you to finish some activities in the blog you can always do it from you house.
The only disadvantage I can think of, is that with blogs you have to have acces to internet and with that you have more posibilities to tempt yourself of doing other things and like you can do the activities in your house maybe you live a side the blog activities some times. But, in general I think that it´s a very good idea to backup an English course.