http://www.jammer-buy.com/bad-wifi-signal.html

Dean Liptak is a natural science teacher who teaches at Fivay high school in Hudson pasco, Florida. Closed 5 days but recently he has suffered a punishment, because he is unhappy students use smart phones in the classroom, the use of excessive, was finally let the teacher decided to let the students use cell phone jammer can’t use a mobile phone and listen attentively. Local station wtsp-tv reported that he built jammers with his knowledge and succeeded in making the bustling classroom quieter.
In an interview he said only the jammers interfere with some scope of classroom, even before the use of jammers to consult with the local law enforcement officers, his answer is that if for not justified to signal interference is to belong to illegal behavior, but obviously Liptak think it is a good reason.
Linda quoted pasco county school district spokesman Cobbe says: “after heard that someone uses interference equipment Verizon has been investigated to the school, because the cellular signal service always be cut off in the region.” Verizon, which later contacted Verizon, said it would not be suing Liptak, and a spokesman said it had declined to comment.
http://www.jammer-buy.com/take-mobile-phone-jammers-for-buses.html