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1. Community
2. Content Requests and Feedback
3. Adding and subtracting negative and positive numbers

When you have (for example) a positive number: 7, and a negative number: -10, you have 7 + (-10), which is just the same as 7 - 10, which is -3. When you have a positive plus a negative, it is alwa...

1. Community
2. Technical Issues and Workarounds
3. My work never saves when I'm working in a New Program/Webpage

I've been having the same issue. I believe that the page will let you close without asking if you want to save because it's supposed to save to your device (locally), but it doesn't.

1. Community
2. Technical Issues and Workarounds
3. Clicking a notification does not redirect to the comment itself

Hey, You can submit a support ticket to file the issue with the team. :)

1. Community
2. Content Requests and Feedback
3. Grade 9 mathematics courses

Hi -  Your daughter should probably start some of the Geometry courses -- They cover basic trig, plus shapes, congruence/similarity, and transformations. (If she's having trouble with some basic Al...

1. Community
2. General Khan Academy Questions
3. Course Completion

Hi matthew.mccarty: If you've already completed the course, then chances are there is some sort of video that you haven't watched. It's no big deal and I wouldn't worry about it :)

1. Community
2. Computing Platform Community Discussions
3. Fonts (Not Really Working)

I would suggest that you check that your device actually has this font installed-- if it does not then you would probably want to install it and then try again. If it doesn't have it installed then...

1. Community
2. Computing Platform Community Discussions
3. Computer programing language

Unfortunately, that's kind of unlikely to happen - they're not working on new programming languages right now. You'd have to learn it somewhere else.

1. Community
2. Computing Platform Community Discussions
3. Custom PJS canvas sizes

I like the idea of this!

1. Community
2. Study Group
3. Mouse tracker challenge,

So when you have your text function: text(mouseX + ", " + mouseY, __, __); Then you have to fill in the x and y coordinates. Instead of using a fixed point, make the x and y the x and y of the mouse.

1. Community
2. Content Requests and Feedback
3. Request to add a python course!

Hello Sumanyu, This is among the most widely asked for requests on Khan Academy, and I to not think that this will be implemented, because if the team were really going to do it, they probably wou...