The 2012 Teen Internet Behavior study shows that there's a profound disconnect between parents and their teenagers regarding teens' online activities. The study stated, "Most parents insist they're in control when it comes to mentoring their teen's online behavior. Yet, many teens believe their parents are in the dark."

Here are some of the most surprising results from the survey:

• 48 percent of parents believe their teens tell them everything they do online.
• 71 percent of teens have done something to hide their online activities from their parents (this statistic is up from only 45 percent in 2010).
• 45 percent of teens visit websites they know their parents would disapprove of; 24 percent of parents are aware of this.
• 43 percent of teens access simulated violence online; 15 percent of parents are aware of this.
• 33 percent of teens admit to watching porn online; 10 percent of parents are aware of this.
• 22 percent of teens cheated on a test via their mobile phones; 5 percent of parents are aware of this.
• On average, teens spend about five hours a day online; parents think their teens spend an average of three hours a day online.

The study concluded, "Parents must be jolted out of their complacency. A huge gap exists between what teens are doing online and what parents really know."