HN title is editorialized inappropriately from source (and focus shifted to absolute results rather than trends and discussion of the reasons behind the trends, which include questions about the validity of the tests.) The source title is “2017 California school test scores: Why are they flatlining?”
Still, the question of "why are the schools in and around Silicon Valley doing so poorly?" is worth discussing. We [residents of supposedly the most innovative region on the planet] should be able to solve these problems, and yet we either are unable to or haven't tried very hard.