"I think that this is probably beyond the ken of 11th graders to fully grasp."

Judging partly by the reaction of my daughter's grade 11 and 12 students, I tend to agree with you.  Most couldn't believe White Privilege ever existed, most refused to believe it may exist today.  Many laughed, looking at their Asian and Middle-Eastern classmates all over the classroom.  

Our Indigenous peoples aren't laughing, though...