I ran across a program that I think will be useful in the last few weeks of school, it is called Cold Turkey and it will temporarily block you off of social media sites, addicting websites, games and even programs (which you pick). You can also choose the amount of time for which these programs and site will be blocked. It was created as a anti-distraction tool so that people can focus on their work. It is free to use but you may donate to a charitable cause if you wish.
Let me know if you decide to try it out! Do you think this could be used in an elementary or high school classroom?