# What are examples of authentic Bell Curves

**URL:** <https://boards.straightdope.com/t/what-are-examples-of-authentic-bell-curves/991098>\
**Category:** Factual Questions\
**Created:** [October 4, 2023, 2:38pm UTC](https://boards.straightdope.com/t/what-are-examples-of-authentic-bell-curves/991098 "2023-10-04T14:38:45Z")\
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**Author:** ![Whack-a-Mole](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/whack-a-mole/32/141_2.png) [@Whack-a-Mole](https://boards.straightdope.com/u/Whack-a-Mole)\
**Post date:** [October 4, 2023, 11:10pm UTC](https://boards.straightdope.com/t/what-are-examples-of-authentic-bell-curves/991098/33 "2023-10-04T23:10:09Z")

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> [@Chronos](#):
>
> Classroom scores tend to be bimodal, with one peak from students who studied and another from students who didn’t.

Is that true if the teacher grades on a curve?

I think the ACT is built to match a curve (based on previously administered tests). In other words, they want the test to produce a bell curve (ideally). That way a school can have some reliable way to know which students are ahead of the curve and desirable to have in their school.

I admit I have no experience of this stuff so looking forward to the corrections on this.

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