I would be curious to break down and audit time against 4 buckets of things you will learn. Things you "need to know", "ought to know", "don't need" and "don't actually understand". I wonder how long it takes to fill each bucket and how much faster the latter two grow.
Experience is the best teacher of all and additional schooling is the biggest barrier to useful experience.
They also include people who have any other unexpected event in their life that affects their employability or income.
a) Forgive their student debt
b) Discourage non-wealthy people from becoming teachers
c) Force schools to pay them more
d) Pay them more via GoFundMe
e) Have less educated teachers
Being forced to pay a school that your children don't attend is rent seeking. Strip schools of all rent seeking funding, make tax money follow the child and let the parents on vote what education style works with their children's attendance.