Instead we should properly tax the billionaires, and then elect public officials who value public education, so they can figure out how to improve schools with the advice and help of all of the local stakeholders.
But a lot of the rich folks’ education initiatives (including Zuckerberg’s, probably) turn out to be more about gaming the tax code and sometimes immigration laws (with a bonus of good PR) than really helping the schools out. https://www.washingtonpost.com/news/answer-sheet/wp/2014/06/...
As an added bonus (more relevant to the Koch brothers than Zuckerberg perhaps), charter schools help break teachers’ unions and destroy the public education system, which has a big knock-on political benefit for Republicans who want to undercut a major base of Democratic party support.