The articles commonly focus on the presence of a "technology-integrated classroom" made possible by the invention of wireless technology devices such as cell phones, personal digital assistants, wirelessly networked handheld computers, wireless sensor network and others.Cell phones are used in distance education in rural Bangladesh through the short message service. The most important effect of wireless technology in education is interactivity, "widely defined as action on the part of the receiver that causes a change in the messages returned by the sender". This is akin to the view that mobile devices serves as a "platform for collaborative modeling" (N. Pinkwart, 2003). This collaborative and interactive environment is also made possible by a device called the wireless sensor network technology which forms a sensor node that enables people to "communicate with each other to collect and move data toward a central entity for further processing" (Jeffrey J. Evans, 2008). An example of how this technology works is the Audience Response System which "includes one hand-held remote per student, a receiver (infrared or radio frequency, depending on the system), a computer for recording student responses, and a means for projecting information lo the class" (Barnes, 2008)Wireless technology also benefits the teachers either through ad-hoc collaborative networks (C. Cortez, 2005) or as a technology to augment "Problem-Based Learning in Special Education" (J. M. Blackboum).