An audio / speaker function that will read the problem to the student.

Nice idea! Hopefully the Khan team will take this into consideration.

Hi jess_ennis,

Thanks for your suggestions!

The developers currently have a lot on their plate, so I can't say if/when something like this might be added.

In the meantime, there are several different extensions you could use on your browser to accomplish what you're after.

Here's just a few for chrome: 

https://chrome.google.com/webstore/detail/read-aloud-a-text-to-spee/hdhinadidafjejdhmfkjgnolgimiaplp

https://chrome.google.com/webstore/detail/snapread-universal/mloajfnmjckfjbeeofcdaecbelnblden

Let me know if you have any further questions!