I think we should start having kids learn basic coding in elementary school, have them very familiar with computers. Maybe have them in higher grades do reverse engineering, and more advance stuff. The future is going to rely on coders and computer literacy will become more and more required whether its use of your phone, computer, how to google, whatever. We should start now and have every kid writing code by the time they reach middle school.
We also need to teach children about cognitive biases, fallacies, how to determine the truthfulness of something, how to verify their sources, how to do basic research on the internet, and how to argue or convince people of new ideas. Ideally you would have a bunch of kids applying the socratic method when talking to their parents, because a lot of parents are about as stupid as their child is intelligent. If you come home and your parents are trying to indoctrinate you into a religion you should feel inclined to ask thought provoking questions. This could have huge effects on society as a whole if we started at an early age teaching children critical skills like this.
Finally I feel like we need to teach more science. When I was in school I remember our teacher telling us the book is wrong and the test is wrong but we have to say atoms are the smallest particles in the universe. That should never happen, science books especially need to be constantly updated for new information. I feel like the way science is handled in schools is not good enough, in my experience it seems like most people don’t actually understand how gravity works for example, all they understand is an apple falls from a tree.
Right now, the average person will anthropomorphize their pet. They will claim religion is personally true to them despite it not being factually true, IE virgin birth. And people yell at each other while arguing just trying to assert their own belief instead of questioning why the other person believes what they believe. Some people actually believe wearing a item of clothing will have an effect on the outcome of a sport. People are irrational as all hell, and if we start teaching children how to think at a early age, I think it will have ripple effects throughout society starting at home when that kid goes to his parents and asks why their parent told them to do this, or why their parent told them this is true.