The sad fact is, it really does cost more to educate a child than the school charges. Rent, salaries, and food will eat up most of the tuition dollars they take in.
How about this as a guide; 5% of your salary per child, with a maximum of 15% of your salary, regardless of how many kids you have in school.
That way the folks making a ton of money would help offset the working class and everyone feels like a mentch. Not some arbitrary number from the tuition board, a fixed ammount, much like maaser.
And no, I’m not opening a school. The idea of a 6 day work week gives me goosebumps!