Do you agree or disagree with the following statements?

There are two following statements, so it should be plural. If you wanted to combine them, you could easily say, "Playing computer games is a waste of time and children should be prohibited from playing them."

Use specific reasons and examples to support your answer.

I would take this sentence out as it appears to be the instruction for the writing assignment.

Computer games have become popular, especially inamong children’s life, because of the game strategies and appealing themes.

I'm not completely sure what you're trying to say here about "game strategies" so a little context might be helpful.

However, I believe that children should be proscribhibited from playing computer games as it affects their academic performance and causes health issues.

First of all, when children are playing computer games, they pay more attention to those games than to academics.

Consequently, young people are unable to focus on their assignments.

This means that devoting more time to playing consoles leads to inadequate time management and superficial completion of academic tasks.

Playing consoles refers to playing video games on a console (Xbox or Playstation), whereas "computer games" (at least in American English) refers to playing a game specifically on the computer. Did you mean video games? Otherwise, great structure here.

Therefore, childrenstudents will get low grades in their tests.

I think using students here just helps it flow a bit better.

For example, I remember when I was in mid-high school at Amherst, I usualregularly played video games regularly after my school hours.

TWherebyn I played, I was completely involved in the game without knowing how timemuch time had passed.

Likewise,And so I spent more time on playing and less time on academics.

As a result, I was runningfrequently ran out of time for my class assignments soand completed the activities without much dedicationfocus.

Thus, I scored C grades forBecause of this, I received C's for many of my assignments.

Right now you're saying that you received the grade of C for all of your assignments. I changed it to a more generic phrase here, "many," in case that was not true. Feel free to change it back.

Had I not utilized themy time in playing computer games, I would have increased my performance in the class projects.

In short, children should concentrate more on academics than on playing time-consuming computer games.

Second of all, children playing computer games is not only a sheer waste of time but it also haves a negative impact on their health.

This means playing games on a computer causes strain on the eyes and itwhich leads to redness of eyes, irritation, and headaches.

Thereforeo avoid these negative health effects, children should avoid computer games for promoting positive health.

I can tell that you've recently learned transition words at the beginning of sentences. While you use them well, I would recommend using more natural transitions. If you have two many sentences that start with "for example, therefore, thus, thereby" it really can hurt the flow of the writing and does not sound natural.

For example, my sister's son Sam whoconstantly plays X box at his home continuouslyome and stares at the monitor while playing his X box.

If your sister's son is your nephew, you could say, "For example my nephew Sam..."

As a result of the radiation coming from the computer monitorstaring at the monitor for hours, Sati's eyes weroften become strained and caused him a headache.

Is his name Sati or Sam?

In essence, I believe that children should be confinnot be allowed to playing computer games because it affects their academic performance and haves a negative impact on their health.