Teenagers should not be allowed to use cell phones at school To what extent do you agreed or disagree

Smart phone is one of greatest inventions and becoming a essential part of our life in modern world. Although it can bring a lot of benefits, it is not good for children especially students at school. So I agree with the view that students should not be allowed to use mobile phone at school. I am persuaded by the two main reason below.
Firstly, one of the most clear reason is that using phone in class easily distracted attention’s student from studying and students do not know how to use the phone on the right purposes .Furthermore, pupil can turn to cheat or chat with friend and play game in the exam. For instance, in my class, it had 75% students, me included , used to mobile phone to search answer in literature or history exam and played online game in other dull subject. Thus, it is obvious example about effect of using phone in class that leads to pupil not to concentrate in study. Therefore, almost parents should consider smart phone as harmful device affecting the student’s learning.
Besides, excessive using phone will have an adverse effect on health of user such as eye diseases (short-sighted or long-sighted..) especially brain diseases. According to research of professor in VNU university, students at high school spend average 6 hours per day on using phone and 80 % student in survey had eye diseases. Moreover, professor Dat believes using phone too much was increased the risk of brain cancer. On account of this, pupil should not excessively use cellphone to protect your health.
In conclusion, students should be banned to use mobile phone at school that helps students focus on study and defend your health

Votes
Average: 7.3 (1 vote)
Essays by the user:

Grammar and spelling errors:
Line 1, column 20, Rule ID: THE_SUPERLATIVE[2]
Message: A determiner is probably missing here: 'of the greatest'.
Suggestion: of the greatest
Smart phone is one of greatest inventions and becoming a essential par...
^^^^^^^^^^^
Line 1, column 56, Rule ID: EN_A_VS_AN
Message: Use 'an' instead of 'a' if the following word starts with a vowel sound, e.g. 'an article', 'an hour'
Suggestion: an
...one of greatest inventions and becoming a essential part of our life in modern wo...
^
Line 2, column 67, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...lear reason is that using phone in class easily distracted attention’s student fr...
^^
Line 2, column 188, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Don't put a space before the full stop
Suggestion: .
...w to use the phone on the right purposes .Furthermore, pupil can turn to cheat or ...
^^
Line 2, column 189, Rule ID: SENTENCE_WHITESPACE
Message: Add a space between sentences
Suggestion: Furthermore
...to use the phone on the right purposes .Furthermore, pupil can turn to cheat or chat with f...
^^^^^^^^^^^
Line 2, column 332, Rule ID: COMMA_PARENTHESIS_WHITESPACE
Message: Put a space after the comma, but not before the comma
Suggestion: ,
... class, it had 75% students, me included , used to mobile phone to search answer i...
^^
Line 3, column 128, Rule ID: DOUBLE_PUNCTUATION
Message: Two consecutive dots
Suggestion: .
...e diseases short-sighted or long-sighted.. especially brain diseases. According to...
^^
Line 3, column 130, Rule ID: UPPERCASE_SENTENCE_START
Message: This sentence does not start with an uppercase letter
Suggestion: Especially
...iseases short-sighted or long-sighted.. especially brain diseases. According to research o...
^^^^^^^^^^

Transition Words or Phrases used:
besides, first, firstly, furthermore, if, moreover, so, therefore, thus, for instance, in conclusion, such as

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on Part of Speech:
To be verbs : 7.0 13.1623246493 53% => More to be verbs wanted.
Auxiliary verbs: 7.0 7.85571142285 89% => OK
Conjunction : 9.0 10.4138276553 86% => OK
Relative clauses : 4.0 7.30460921844 55% => More relative clauses wanted.
Pronoun: 16.0 24.0651302605 66% => OK
Preposition: 44.0 41.998997996 105% => OK
Nominalization: 1.0 8.3376753507 12% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.

Performance on vocabulary words:
No of characters: 1370.0 1615.20841683 85% => OK
No of words: 281.0 315.596192385 89% => More content wanted.
Chars per words: 4.87544483986 5.12529762239 95% => OK
Fourth root words length: 4.09427095027 4.20363070211 97% => OK
Word Length SD: 2.65912270991 2.80592935109 95% => OK
Unique words: 169.0 176.041082164 96% => OK
Unique words percentage: 0.601423487544 0.561755894193 107% => OK
syllable_count: 411.3 506.74238477 81% => OK
avg_syllables_per_word: 1.5 1.60771543086 93% => OK

A sentence (or a clause, phrase) starts by:
Pronoun: 5.0 5.43587174349 92% => OK
Article: 0.0 2.52805611222 0% => OK
Subordination: 1.0 2.10420841683 48% => OK
Conjunction: 0.0 0.809619238477 0% => OK
Preposition: 4.0 4.76152304609 84% => OK

Performance on sentences:
How many sentences: 14.0 16.0721442886 87% => OK
Sentence length: 20.0 20.2975951904 99% => OK
Sentence length SD: 58.1423306399 49.4020404114 118% => OK
Chars per sentence: 97.8571428571 106.682146367 92% => OK
Words per sentence: 20.0714285714 20.7667163134 97% => OK
Discourse Markers: 7.78571428571 7.06120827912 110% => OK
Paragraphs: 4.0 4.38176352705 91% => OK
Language errors: 8.0 5.01903807615 159% => OK
Sentences with positive sentiment : 6.0 8.67935871743 69% => OK
Sentences with negative sentiment : 4.0 3.9879759519 100% => OK
Sentences with neutral sentiment: 4.0 3.4128256513 117% => OK
What are sentences with positive/Negative/neutral sentiment?

Coherence and Cohesion:
Essay topic to essay body coherence: 0.281717983597 0.244688304435 115% => OK
Sentence topic coherence: 0.102524174411 0.084324248473 122% => OK
Sentence topic coherence SD: 0.0985461035958 0.0667982634062 148% => OK
Paragraph topic coherence: 0.194435188972 0.151304729494 129% => OK
Paragraph topic coherence SD: 0.0453579604006 0.056905535591 80% => OK

Essay readability:
automated_readability_index: 11.6 13.0946893788 89% => Automated_readability_index is low.
flesch_reading_ease: 59.64 50.2224549098 119% => OK
smog_index: 3.1 7.44779559118 42% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.3001002004 88% => OK
coleman_liau_index: 11.02 12.4159519038 89% => OK
dale_chall_readability_score: 8.28 8.58950901804 96% => OK
difficult_words: 65.0 78.4519038076 83% => More difficult words wanted.
linsear_write_formula: 9.0 9.78957915832 92% => OK
gunning_fog: 10.0 10.1190380762 99% => OK
text_standard: 10.0 10.7795591182 93% => OK
What are above readability scores?

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Rates: 73.0337078652 out of 100
Scores by essay e-grader: 6.5 Out of 9
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.