"In 2007, [filtering] was high school students’ number one obstacle to using technology at their schools (53 percent). For middle school students, two obstacles tied for the greatest barrier (39 percent each): “there are rules against using technology at school” and “teachers limit technology use”. It’s likely that when students face obstacles to using technology at school, they also face obstacles to inquiry-based learning opportunities which can include online research, visualizations, and games."