Thanks for folks pointing out the link to the article on Dallas -- I'll post it here to boost it. https://www.the74million.org/article/dallas-isds-opt-out-pol...
25 years ago I was part of my National Honor Society outreach committee. One of the things I and my committee co-chair did was go to all the "normal" (rather than IB) classes and tell students that with a good GPA they could join NHS (as NHS did have a demographic makeup that wasn't reflective of the school). Students had no idea. The outreach did make a difference. The Dallas experiment, and the tutoring discussion in the article, resonate deeply with my later experiences as a math prof as well. Pushing kids results in higher achievement.