Evan Lewis

1. Topluluk
2. General Khan Academy Questions
3. Calculating Correlation Coefficient r

Hi George, Here's a video from the AP Statistics course that explains what the Z-score is: https://www.khanacademy.org/math/ap-statistics/density-curves-normal-distribution-ap/measuring-position/v/...

1. Topluluk
2. SAT Questions and Feedback
3. Skill levels

Hi Aryan, Unfortunately, there's not a way to reset your skill level on an SAT skill. However, if you get a question wrong on one of the practices, your skill level will automatically lower. You sh...

1. Topluluk
2. General Khan Academy Questions
3. Can I join a science class without a teacher?

Hi dessyig92, All users are able to access all of the learning materials for free without needing a teacher or class code to join. You can access a full list of all of the available science courses...

1. Topluluk
2. Technical Issues and Workarounds
3. I am stuck on a Challenge

In case you haven't already resolved this issue, there are a couple errors in your code that are probably causing the error. In the first screenshot, you have an extra ) after "Pop". The line shoul...

1. Topluluk
2. Computing Platform Community Discussions
3. Is it possible to auto-hide a comment somehow without having to make it less than 3 characters?

Our discussions system uses an AI filter to detect low quality posts, but there's not a specific phrase (other than inappropriate words and off-site links) that you could use to auto-hide comments....

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2. Content Requests and Feedback
3. For the courses that are going to be discontinued, will the respective videos still be available on YouTube?

Hi Eddie, There's not an explicit plan to remove the MCAT videos from Khan Academy's YouTube channel, but we can't guarantee that they will still be available after September 2021. We understand th...

1. Topluluk
2. Technical Issues and Workarounds
3. My students' projects are not showing as completed on my score sheet

Hi Caridad, I'm sorry to hear you're experiencing this issue! Could you please submit a support ticket so we can further investigate? Thanks!

1. Topluluk
2. General Khan Academy Questions
3. Algebra 1

In addition to what Blue-Ice mentioned, it may also be helpful to know that the Algebra 1 course has 328 videos with a total runtime of 28 hours. So at a minimum, it would take 28 hours to watch al...

1. Topluluk
2. General Khan Academy Questions
3. Less Than 3 Character Posts Don't Always Get Hidden

Got it---thanks!

1. Topluluk
2. General Khan Academy Questions
3. How Long Does the Average Course Take?

thaoviet131 The High School Biology course has 128 videos with a total length of about 19 hours