You can't teach people everything they need to know. The best you can do is position them where they can find what they need to know when they need to know it. (Seymour Papert)

Using social networks to improve your English is one of the many options open to you in this day and age. There are also many advantages to online and computer-based learning; but there are disadvantages as well. Can you add to this list of advantages and disadvantages of eLearning?