Every one could make mistake, and teacher or leaders make no exception. People response to those mistake in different ways. From my perspective, I would like to wait until the class or the meeting is over and then discuss with them.
To begin with, it would leave people who made mistakes a good impression. Since you did not interrupt them and point out their mistake, which could hurt their feelings or let them lose face in front of all the stuffs or students. To illustrate this idea, I would like to use the example of myself. In a computer system course in my university, I noticed that the professor made a calculation mistake which is also noticed by others. They raised their hands and pointed out the mistake. The professor seems unhappy for the feeling of lost of authority in front of all the students. However, after the class, I privately talked with him about several details of that mistake, and we became closer after then. As the result, I believe leaving the problem until the class or the meeting is over is a better option.
Another reason to endorse my view is that pointing out the question would let the speaker feel that you listened to what they said and tried to understand it. Usually, the leaders or the teacher could be thankful to someone who points out the problem. Still use the example of my professor. Last time when I was participating one of his programs, I found a bug in the code of the demo. Instead of speaking out in the presentation, I found him after the presentation, and he was impressed by my observation and promised to write the recommend letter for me.
Even if we take a step backward, says that we could remain silence. However, it is not good in the long run, since it would let the teacher or the leader look down upon you ability. Last time, when my professor made a mistake and then found it by himself, he seriously doubt all of us are not listening.Therefore, I still strongly believe that we still need to point out the problem, but not immediately.
To wrap it up, although it could be hard to choose the right method in the first place, especially when it is taken into consideration under various situation in the real world, I still believe it is better to have a sincere talk after the class or the meeting is over.
Grammar and spelling errors:
Line 5, column 529, Rule ID: A_INFINITVE[1]
Message: Probably a wrong construction: a/the + infinitive
...by my observation and promised to write the recommend letter for me. Even if we take a st...
^^^^^^^^^^^^^
Line 7, column 270, Rule ID: HE_VERB_AGR[3]
Message: The pronoun 'he' must be used with a third-person verb: 'doubts'.
Suggestion: doubts
... then found it by himself, he seriously doubt all of us are not listening.Therefore, ...
^^^^^
Line 7, column 304, Rule ID: SENTENCE_WHITESPACE
Message: Add a space between sentences
Suggestion: Therefore
...ously doubt all of us are not listening.Therefore, I still strongly believe that we still...
^^^^^^^^^
Transition Words or Phrases used:
also, but, first, however, if, look, so, still, then, therefore, to begin with, in the first place
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 14.0 15.1003584229 93% => OK
Auxiliary verbs: 11.0 9.8082437276 112% => OK
Conjunction : 18.0 13.8261648746 130% => OK
Relative clauses : 13.0 11.0286738351 118% => OK
Pronoun: 57.0 43.0788530466 132% => Less pronouns wanted
Preposition: 65.0 52.1666666667 125% => OK
Nominalization: 9.0 8.0752688172 111% => OK
Performance on vocabulary words:
No of characters: 1879.0 1977.66487455 95% => OK
No of words: 413.0 407.700716846 101% => OK
Chars per words: 4.54963680387 4.8611393121 94% => OK
Fourth root words length: 4.50803742585 4.48103885553 101% => OK
Word Length SD: 2.5940894676 2.67179642975 97% => OK
Unique words: 207.0 212.727598566 97% => OK
Unique words percentage: 0.501210653753 0.524837075471 95% => OK
syllable_count: 582.3 618.680645161 94% => OK
avg_syllables_per_word: 1.4 1.51630824373 92% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 13.0 9.59856630824 135% => OK
Article: 2.0 3.08781362007 65% => OK
Subordination: 7.0 3.51792114695 199% => OK
Conjunction: 4.0 1.86738351254 214% => Less conjunction wanted as sentence beginning.
Preposition: 9.0 4.94265232975 182% => OK
Performance on sentences:
How many sentences: 20.0 20.6003584229 97% => OK
Sentence length: 20.0 20.1344086022 99% => OK
Sentence length SD: 57.407839186 48.9658058833 117% => OK
Chars per sentence: 93.95 100.406767564 94% => OK
Words per sentence: 20.65 20.6045352989 100% => OK
Discourse Markers: 4.9 5.45110844103 90% => OK
Paragraphs: 5.0 4.53405017921 110% => OK
Language errors: 3.0 5.5376344086 54% => OK
Sentences with positive sentiment : 8.0 11.8709677419 67% => OK
Sentences with negative sentiment : 9.0 3.85842293907 233% => 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: 0.0941801560907 0.236089414692 40% => The similarity between the topic and the content is low.
Sentence topic coherence: 0.0284370629899 0.076458572812 37% => Sentence topic similarity is low.
Sentence topic coherence SD: 0.0242503192986 0.0737576698707 33% => Sentences are similar to each other.
Paragraph topic coherence: 0.0554939674208 0.150856017488 37% => Maybe some paragraphs are off the topic.
Paragraph topic coherence SD: 0.0140137131923 0.0645574589148 22% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 10.3 11.7677419355 88% => Automated_readability_index is low.
flesch_reading_ease: 68.1 58.1214874552 117% => OK
smog_index: 3.1 6.10430107527 51% => Smog_index is low.
flesch_kincaid_grade: 8.7 10.1575268817 86% => OK
coleman_liau_index: 9.11 10.9000537634 84% => OK
dale_chall_readability_score: 7.38 8.01818996416 92% => OK
difficult_words: 72.0 86.8835125448 83% => More difficult words wanted.
linsear_write_formula: 6.0 10.002688172 60% => Linsear_write_formula is low.
gunning_fog: 10.0 10.0537634409 99% => OK
text_standard: 10.0 10.247311828 98% => OK
What are above readability scores?
---------------------
Rates: 70.0 out of 100
Scores by essay e-grader: 21.0 Out of 30
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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.