Economics class is usually in high school and it's optional.

Schools are really expensive to operate. Most districts and schools make it easy to graduate to maximize their graduation rates. Standardized testing is suppose to catch local lowering of standards but state departments of education are also under pressure to maximize test pass rate. So resources flow into pulling the bottom quintile of students up to a minimum standard. This means teaching to the test on math and English, and de-prioritizing other subjects or dropping them entirely.

We could expand the breadth of educational basic standards. This would require a cultural shift in valuing formal education more, increasing teacher training/recruiting resources, making schools year round, more centralization of education budgets at the state or even Federal level.

Generally speaking public schools tend to be better in states like Massachusetts than Kansas.