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allvol123

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#1
@AM64
@kiddiedoc
@SpaceCoastVol
@hog88

And anyone else I am forgetting.

My kid is 0.5 points away from getting a B instead of a C in class. I have a math problem scenario for you. Tell me I am wrong or right.

So a 20% of your entire grade is made up of let's say your quiz grades for the year.

So if you make a 80, 66.67, 60, and 75....then your average is 70.4.

That said you got those grades from making a 4 of 5, a 2 of 3, a 6 of 10, and 3 of 4. So those examples correspond to the number grades above. My kids idiot teacher wants to say my child got 15 of the possible 22 points on those quizzes and this earned a 15/22 which is a 68. Vastly different than my average above.

This moron is not comprehending this is not an average. Her method faults because of the different amount of questions on each quiz. The quizzes end up weighing differently.

Someone prove me wrong before I go off on this person.
 
Last edited:
#4
#4
Maybe the teacher wants some quizzes to count more and some to count less. Maybe the 3 point one was a pop quiz after a lesson while the 10 point one was over 2-3 topics.

My son, who is a soph in HS, has the same grading in some classes ( some quizzes count more than others).

But hey, I'm just a guy with an elephant a$$ avatar
 
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#16
#16
allvol123 said:
Also, I'm going to use your "simple weighted mean aggregation" in my email.

Do you believe I am correct or wrong?
Click to expand...
Neither.

It's a different method. I butter my bread before putting in pan for my grilled cheese sammich. You put a pat of butter in the pan to melt and put your bread on it. Different methods for same sammich.
 
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#17
#17
allvol123 said:
Also, I'm going to use your "simple weighted mean aggregation" in my email.

Do you believe I am correct or wrong?
Click to expand...
You should read that link. It specifically addresses your situation.
 
#18
#18
McDad said:
Neither.

It's a different method. I butter my bread before putting in pan for my grilled cheese sammich. You put a pat of butter in the pan to melt and put your bread on it. Different methods for same sammich.
Click to expand...

It isnt neither. It makes a grade difference.

The overall grade is a weighted average. 20% quizzes, 40% tests, 10% final, etc.

Each subcomponet (quiz, tests, ) is the average.

Teacher is creating a overall grade from weighted values (which is normal) but then also using weighted values inside each component which is not true to what is stated on calling it average.
 
#19
#19
allvol123 said:
It isnt neither. It makes a grade difference.

The overall grade is a weighted average. 20% quizzes, 40% tests, 10% final, etc.

Each subcomponet (quiz, tests, ) is the average.

Teacher is creating a overall grade from weighted values (which is normal) but then also using weighted values inside each component which is not true to what is stated on calling it average.
Click to expand...
Fair point. The consequence of the calculation is different. It is neither because both ways are just as valid to figure a final grade.

I suspect if you push "average" teacher will say she erred in the terminology. Then you're left with weighted aggregate and still shy the needed points.

Only you and your kid know if the average was an incentive to strive for the B because of how he was figuring the needed scores. If it wasn't, you may be able to get the B on a "technicality" (no offense intended).
 
#20
#20
If the grading system is dependent on an average of the individual quizzes, then your thinking is correct. This would mean that each quiz is worth equal credit and proportion of the grade. The quiz average would be 70.4%.

She is using a weighted grade, where the quizzes are basically all part of a "22 question test." In that case, he got 15/22 questions correct, yielding a 68% grade.

Do you have a written explanation of the grading system? "Quiz average" should be the first (70.4) number.
 
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#22
#22
McDad said:
Fair point. The consequence of the calculation is different. It is neither because both ways are just as valid to figure a final grade.

I suspect if you push "average" teacher will say she erred in the terminology. Then you're left with weighted aggregate and still shy the needed points.

Only you and your kid know if the average was an incentive to strive for the B because of how he was figuring the needed scores. If it wasn't, you may be able to get the B on a "technicality" (no offense intended).
Click to expand...

Thanks for the serious reply. My kid worked hard in a subject that is tough for them.

It is a technicality but I believe I am correct. Everyone understands overall grades are weighted averages. But in my education I remember quiz average or something similar always literally being the straight average.

Otherwise, the teacher here should have taken this category and broke it out to each weighted average like they did the other items. There were different type of assignments in this category.
 
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#24
#24
kiddiedoc said:
If the grading system is dependent on an average of the individual quizzes, then your thinking is correct. This would mean that each quiz is worth equal credit and proportion of the grade. The quiz average would be 70.4%.

She is using a weighted grade, where the quizzes are basically all part of a "22 question test." In that case, he got 15/22 questions correct, yielding a 68% grade.

Do you have a written explanation of the grading system? "Quiz average" should be the first (70.4) number.
Click to expand...

The category was actually called "weekly assignments". It had about 3 different kinds of assignments that repeated inside that category.

They needed to break those 3 out and note their weight, IMO. Just as you note quizzes are weight 25% for example.
 
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