Hi M M,

Thank you so much for letting us know what you would like to see added to the site! 

I've passed your feedback along to the team and it will be part of our conversation as we plan the future of Khan Academy. Our team is always looking for content that will make our user's time on Khan Academy more productive and fruitful, so your feedback is super helpful!

Thanks again for your interest in improving Khan Academy :)

All the best,

Le