What do you think about electronic forms of communication such as Facebook, Twitter, etc?
On the one hand, to have social networks has many advantages, because you can see photos, states, ... . In the case of Twitter, you can write tweets with a maximum of 140 words. In other words, each application works in a different way from other
applications. But when an application is very successful, the other applications try to copy it. For example when Snapchat went out and has successful, other applications as Instagram, Whatsapp copied it.
On the other hand, to have social networks can be very harmful for you, if you don't know how to use them well. Because there are companies that can see what you are looking for, for example Huawei. Moreover there are secret companies that they do it. All social networks are public and anybody can see photos of you, your states, etc. In addition there are people that they are bored and they create fake accounts and they pretend to be you.
Finally there are applications that teachers can get in touch with you or your parents, for example Moodle, Edmodo, Séneca, etc. In my high school the majority of teachers use Moodle, they raise the notes there and we dowload it or even we print it. And teachers pass list in the class to see that students is obsent. Then they pass list and if you are obsent, Séneca sends a message to your parents.