Hi Pauline,

Thank you for sharing your thoughts on our Chemistry section. I've got great news! The content team has confirmed that we'll be adding lots of middle and high school level chemistry material (videos and practices) later this year! And that is all possible thanks to great feedback like yours :)

As we grow and expand, we’re continuing to add new content to offer a better education at Khan Academy. Investing more heavily in the content team is actually one of our major initiatives.

Thank you for being part of our community!

Warm regards,

Alex