Have to bring it up again.
Playing Prussia it is 1854 now and while everything else is in good shape my education rate has been going down to 80% in general.
While in the most provinces it is still over 90% in others it is down to a mere 60%. Even in my capital Berlin it is only 62% by now.
That goes along reciprocal to the growth rate.
In regions with a growth rate over 1,6 education is down to less than 70.
In regions with a growth rate under 1,5 education is over 90.
I have no tool to influence education in general or in special in a single region.
No school or university building improvement or anything else what I see I can do to bring my country back to the enlightened year of 1850 where everybody was at least able to read and write.
What can I do? What did I oversee? What game mechanic I am simply not aware of?