Unfortunately for the US "funding" can mean "public money is channeled to corporate monopolies which own various markets for teaching resources."

It's also managed at the school level, which means all kinds of people with eccentric belief systems are motivated to take over school boards and force their issues on others.

But elements of curriculum design are also created semi-centrally. So you can get the worst of all possible worlds, with corporations skimming money from classrooms while faddy ineffective teaching techniques collide with school board skirmishes.

In Texas textbooks and curriculum is state level mostly. Idiots on school boards don’t have much to do with what is taught. And definitely not in important classes like math. And most funding goes to the schools not corporations