Extended Time for Disabled Students on Full tests and Timed mini-tests

I have accommodations for time and a half on the math section approved by the college board, and that's how I'll be taking my SAT. When the test cuts me off, there are many problems left that I know how to do, but I can't finish on Khan, even though I would have time to do them all on the actual SAT since I have my extension. It brings my skill scores down in areas I know well, which means my suggested mini-quizzes and activities are tailored to things I just didn't make it to at the end of the tests or quizzes, instead of subjects I actually need to practice more. If you could have a setting somewhere that does the most common time accommodations, I'm sure it would help a lot of students and myself. Thanks!