There are some things you can do to improve the class behavior. You could restrict the use of social pages to the group, but you already did that. You shouldn´t block the websites, since that would be a drastic resource and nobody really wants to do that. Maybe you could talk to those people who you think are misbehaving. People that don't behave theirselves could have a meeting with their parents and Salgado. This would really make them behave. As you mentioned in class, people that are talking could work without a computer. Also, the new grading system you made is efficient. Or maybe, this people should just learn to behave by theirselves, they're not adults, but they're mature enough to control theirselves in class. If people could just learn to behave we wouldn't even have to mention this forms to get them to behave. We all want a free, comfortable space to learn about how to use a computer and its functions. Let's make it true by improving now, and later gaining things for the future.