Regina Litman

1. Cộng đồng
2. News and Updates from Khan Academy
3. Content Update: June 2018 New Calculus Courses

I just had a look at the new one for Integral Calculus, and it addresses concerns I had about the old course, in which articles, videos, and even exercises contained content that hadn't been covere...

1. Cộng đồng
2. News and Updates from Khan Academy
3. Content Update: June 2018 New Calculus Courses

Will both the new and the old be available in the iOS and Android apps?

1. Cộng đồng
2. Mobile Platform Questions and Feedback
3. Missing button for variable

The ticket number is 201597. The exercise in which I had the problem is: Calculus (all content, first year) -> Taking derivatives -> e^x and ln(x) derivatives -> Special derivatives quiz Calculus (...

1. Cộng đồng
2. Mobile Platform Questions and Feedback
3. Missing button for variable

I ran across this, too. In an advanced course, where I needed to use e (Euler’s constant) as well as the variable x, the portion of the keyboard where a variable, e, or pi would be shown in the iPa...

1. Cộng đồng
2. Mobile Platform Questions and Feedback
3. New answer keyboard

The lesson here is, don’t wish for what you want, you may actually get it. I had been wishing for a calculator-like entry format for iPad practice exercises, which were already in use in the iPad a...

1. Cộng đồng
2. Mobile Platform Questions and Feedback
3. New answer keyboard

I just reported the 1% complete problem.

1. Cộng đồng
2. Content Requests and Feedback
3. Use anzan and other high-tech math methods

The answer is fifty, I got it by converting zero point zero four to the fraction one over twenty-five and then multiplying the original numerator two by the resulting reciprocal of twenty-five. It ...

1. Cộng đồng
2. Content Requests and Feedback
3. The leveling-up setup

Regarding the silly mistake comment - A lot of times for multiple choice questions, at least one and perhaps all of the incorrect answers are what would be result from various “silly” mistakes, suc...

1. Cộng đồng
2. Study Group
3. About learning trigonometry

Yes, definitely do all the trigonometry you can before entering calculus. Trigonometric functions show up everywhere in Calculus. Also, focus on angle measurement in radians, not degrees. All of th...

1. Cộng đồng
2. Content Requests and Feedback
3. ERROR IN VIDEO - See Details Below

I’ve found several math errors in videos. What you can do if you’re using the website version of Khan Academy is to go into what I think is called Discussion for the video. (This is where users can...