Long time user, logging in from a work email. 
I'd like to suggest a small module being added simply for computer/internet basics. The absolute basics. I think this goes in line with Khan Academy's mission statement to give quality education to anyone in the world with internet access. Some folks in underprivileged communities go most of their lives without interacting with a computer at all. In my instance, I'm referring to people living on native reservations throughout the United States. When searching for resources for them to become more familiar with basic computer usage, I was shocked to discover this hadn't been added to Khan Academy (my go to suggestion for people seeking access to quality educational material). I think, in order for them to make the most of the incredible wellspring of educational resources you've created and curated, they need to have the computer essentials necessary to use it.
Thanks for your time in even considering my humble suggestion, and for your awe inspiring work. You're all absolute legends.