I think it is definitely a bad idea to give money to a child as a reward for his academic performance. AIthough this action may stimulate his willing to study harder, it will have many negative effects in the long term.
First and foremost, the student might build a wrong mindset that they are studying for their parent. The study is a process to obtain knowledge and become a better person. If you are studying something, it is not appropriate for you to look for rewards because the study is beneficial to yourself. This is the biggest reward to everyone who is studying hard. Studying is not a special term for students, but for everyone. If children build a wrong impression about the study, they will just study for a high grade rather than appreciate the knowledge itself. In this situation, the study loses its biggest meaning.
Secondly, they will lack the power to study in the future. There is no doubt that parents can't reward their children for studying harder after they graduated from college. But it is necessary for a person to study all through his life. Suppose the child is going to work someday, he will not willing to obtain new knowledge anymore. It will be awful for a company to hire someone who can't obtain new knowledge at work. It is quite hard to imagine a person who has the same amount of knowledge in his fifties and in his twenties. The saying" Graduation from school is the climax of your knowledge." is quite a pity.
Last but not least, it is harmful to children to build a wrong concept about money. If parents just reward the children with large amounts of money without guiding them on how to use the money, they will just spend the money at their will. To make things worse, children may use the money to buy products which are not appropriate at their age. For example, drugs can easily destroy a child's whole life. At least, parents should teach children how to make use of the money.
In a nutshell, giving children money for a high grade is a bad idea in the long term because children will have a wrong concept about money and study. Parents can use other ways to stimulate children's interest in the study such as a trip to museums or travel around famous colleges. High grade is something deserves a reward, but having the right concept about study and money is more important.
Grammar and spelling errors:
Line 5, column 91, Rule ID: CANT[1]
Message: Did you mean 'can't' or 'cannot'?
Suggestion: can't; cannot
... future. There is no doubt that parents cant reward their children for studying hard...
^^^^
Line 5, column 385, Rule ID: CANT[1]
Message: Did you mean 'can't' or 'cannot'?
Suggestion: can't; cannot
...awful for a company to hire someone who cant obtain new knowledge at work. It is qui...
^^^^
Transition Words or Phrases used:
but, first, if, look, may, second, secondly, so, at least, for example, i think, no doubt, such as
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 21.0 15.1003584229 139% => OK
Auxiliary verbs: 14.0 9.8082437276 143% => OK
Conjunction : 10.0 13.8261648746 72% => OK
Relative clauses : 6.0 11.0286738351 54% => More relative clauses wanted.
Pronoun: 35.0 43.0788530466 81% => OK
Preposition: 49.0 52.1666666667 94% => OK
Nominalization: 3.0 8.0752688172 37% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1928.0 1977.66487455 97% => OK
No of words: 418.0 407.700716846 103% => OK
Chars per words: 4.61244019139 4.8611393121 95% => OK
Fourth root words length: 4.52162009685 4.48103885553 101% => OK
Word Length SD: 2.43980201415 2.67179642975 91% => OK
Unique words: 193.0 212.727598566 91% => More unique words wanted.
Unique words percentage: 0.461722488038 0.524837075471 88% => More unique words wanted or less content wanted.
syllable_count: 590.4 618.680645161 95% => OK
avg_syllables_per_word: 1.4 1.51630824373 92% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 11.0 9.59856630824 115% => OK
Article: 4.0 3.08781362007 130% => OK
Subordination: 3.0 3.51792114695 85% => OK
Conjunction: 3.0 1.86738351254 161% => OK
Preposition: 4.0 4.94265232975 81% => OK
Performance on sentences:
How many sentences: 24.0 20.6003584229 117% => OK
Sentence length: 17.0 20.1344086022 84% => The Avg. Sentence Length is relatively short.
Sentence length SD: 29.6267287353 48.9658058833 61% => OK
Chars per sentence: 80.3333333333 100.406767564 80% => OK
Words per sentence: 17.4166666667 20.6045352989 85% => OK
Discourse Markers: 4.08333333333 5.45110844103 75% => OK
Paragraphs: 5.0 4.53405017921 110% => OK
Language errors: 2.0 5.5376344086 36% => OK
Sentences with positive sentiment : 8.0 11.8709677419 67% => OK
Sentences with negative sentiment : 13.0 3.85842293907 337% => Less negative sentences wanted.
Sentences with neutral sentiment: 3.0 4.88709677419 61% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.239108978101 0.236089414692 101% => OK
Sentence topic coherence: 0.0743082817068 0.076458572812 97% => OK
Sentence topic coherence SD: 0.0520049973939 0.0737576698707 71% => OK
Paragraph topic coherence: 0.139652935949 0.150856017488 93% => OK
Paragraph topic coherence SD: 0.0437689810014 0.0645574589148 68% => OK
Essay readability:
automated_readability_index: 9.0 11.7677419355 76% => Automated_readability_index is low.
flesch_reading_ease: 71.14 58.1214874552 122% => OK
smog_index: 3.1 6.10430107527 51% => Smog_index is low.
flesch_kincaid_grade: 7.6 10.1575268817 75% => OK
coleman_liau_index: 9.16 10.9000537634 84% => OK
dale_chall_readability_score: 7.28 8.01818996416 91% => OK
difficult_words: 74.0 86.8835125448 85% => OK
linsear_write_formula: 8.0 10.002688172 80% => OK
gunning_fog: 8.8 10.0537634409 88% => OK
text_standard: 9.0 10.247311828 88% => OK
What are above readability scores?
---------------------
Rates: 66.6666666667 out of 100
Scores by essay e-grader: 20.0 Out of 30
---------------------
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.