Student use of computers

We can see (observe) that the average number of hours a student spends on the computer per a week has increased by less than two hours between 1995 to 2000, then to 14 hours in 2005. (do you mean it increased by 14 hours between 2000-2005, or that in this period students spent 14 hours total on the computer? not clear)  
What is the reason for this phenomenon ? Firstly, with the development of society (in your example, it is technology that developed, not society.) technology. Computers have more and more functions that can be used for our work and life. So make it's possible to communicate with people face to face in most parts of the world by computer. Secondly, the price become cheaper and cheaper (太中文想法）has dropped exponentially —most university students can afford one.
Voice for and against computer have been heard since their birth (sorry, this is really confusing to a native speaker!) Since the advent of computers, there have been both advocates and critics. Some people believe that students who spend all their time playing video games will abandon their studies. Meanwhile, the cost of repairing computers is too great, and it is also very time-consuming.
I believe we should treat this phenomenon the right way and make good use of the advantages of computers and eliminate the disadvantages.