Students studying abroad will be a good example for people who benefit from mobiles for contacting parents overseas.
What do you mean by contacting? Phoning, chatting or video calling? Phoning was ago. Nowadays, some students prefer using a skype or yahoo messenger, which is provided gratis
Well, if you have a question that you don't like at all, then you can write with a 5-paragraph essay. You write one introduction, three bodies, and one conclusion. In the bodies, you will argue more on one side than the other by writing two content paragraphs arguing positive and negative effects. This can help you write more words, but some students, that I see, put grandiose ideas, by writing too many words. Uppsss.., remember, 40 minutes to finish your essay are a must :D
Well, If I were you, I wrote a four-paragraph essay. One introductory paragraph, two bodies with examples per each and one concluding paragraph.h structure this is weak.