Right now I can improve the quality of education dramatically so that all of our test results are far better than they are now, and I can do that for significantly less money than we are currently spending. Conservatively, I would say for half of what we are currently spending.
The problem is that those improvements will come by changing the instructors to Khanmigo and teachers who currently make a good salary can be replaced with people making minimum wage. The only reason the savings isn't more is because I would keep the teams, the after school programs, and would want our best and brightest teachers (let's say top 20%) to stay and be like band leaders in helping teams of students use AI to write books, movies, create art, and computer applications.
The second problem is that I know that the process of removing the "inefficient" teachers and replacing them with AI is the exact same process that Elon Musk used in DOGE in making the Federal government "more efficient". DOGE is not R&D, it is a showcase of how AI can make a company or business more efficient. He worked on that project to sell AI and not to the CEO, but to the board of directors and the stockholders. Not all people running companies are cold and heartless. They won't want to lay people off unless they have no choice. Elon is not looking for a slow rollout with stories of how this department and that department were helped. No, he wants to claim they can save trillions of dollars and get up there on a daily basis making press announcements of the savings.
I also suspect that when people see this homeschooling will take off, especially out of churches. So the number of students in "public school" could drop by 50%.