It reads "most demanding courses available AT SCHOOL "
not MOST DEMANDING ANYWHERE IN THE WORLD.
Just at YOUR SCHOOL.
That is why I have copied it again . And why I have emphasized the most important words in capital letters.
If you want the chance to get into great colleges, you will need to develop the skill and patience to read more carefully.
So get great grades in the classes AVAILABLE to you, impress your teachers with your intelligence- their LORs are critical to your college applications, take other classes that interest you AT YOUR SCHOOL, participate in outside interests, and do your best.
PLEASE read this, which is at the bottom of the same web page I linked earlier- i added caps for emphasis.
" AP scores that are reported are acknowledged but RARELY play a significant role in the evaluation of an application. GRADES earned over the course of a term, or a year, and EVALUATIONS from instructors who can comment on classroom engagement provide us with the MOST detailed insight into a student’s readiness for the academic rigors of Stanford.
If Stanford wanted kids to take AP tests for outside self studied classes, they would say so.