Hi Whitney,

As we grow and expand, we continue to add new content and features to offer a better education on Khan Academy. However, enabling a way to take specific sections of a practice test is not a part of our roadmap at this time.

While we wish we could implement all of our users' requests, we need to make difficult decisions about which features and requests are aligned with our goals at the time.

I know that this probably isn’t the response you were looking for, but I hope you understand where we’re coming from. 

Thanks again,