Things your child likely won't tell you when you ask them, "What did you learn in school today?":
In K3, I learned that staying home with my mother was no longer an option. On the very first day, I learned that none of the workers cared the least bit about me, when they left me to cry in the entry all day long, until my mother picked me up again in the evening.
In K4, I learned that smoking was cool. The other kids and I would pick up the cigarette butts discarded by the kindergarten "teachers" in the yard, and pretend smoking them during recess.
In K5, I learned that I would have to fend for myself for the entire rest of my school career when both my older brothers moved on to the elementary school, and I was left alone in kindergarten. I also learned that no amount of crying/pleading/begging got me out of being forced to attend.
In 1st grade, I learned that school is very boring to those who fall outside the one-size-fits-all cookie cutter design. I learned that the teacher disliked kids like me who had already learned to read (from my older brothers), and that her main goal for me was to keep me sitting silent the entire day, forbidden to answer any questions because I was somehow unfairly advantaged.
In 2nd grade, I learned that kids in German schools were no less cruel than those in Hungary had been. While in Hungary I had been called a fascist for being half-German, I was now being mocked for being a poor Hungarian gypsy. Of course, I was neither. I also learned that German teachers were no more keen on advanced students than my Hungarian teacher had been.
In 3rd grade, I learned that it was perfectly acceptable for my intimidating male teacher to pick students up by their ears if he wanted to punish them for speaking out of turn.
In 4th grade, I first grasped the concept of boys being after girls when one of the students in my class would keep track of, and boast about, how many times he was able to force himself onto a certain little girl in our class and kiss her against her will.
In 5th grade, I learned about sex ed., something I was entirely too young and naive for.
In 6th grade, I was first exposed to the incredible smut and wickedness being dished up in "teen" magazines.
In 7th grade, I learned that "dating" was no longer optional, but expected in order to be "cool".
In 8th grade, I was taught in Religious Education (R.E.) class that the Bible was not true, but rather just an old book full of outdated fables.
In 9th grade, I found out that only the most expensive brand name clothes were acceptable in order to be considered "cool". I learned that how a person looked was a lot more important than how they acted, felt, or thought.
In 10th grade, I realized that Catholic priests (who were often teaching the R.E. class) were serious predators to be avoided at all cost, and joined a small minority of students who opted to take "Ethics" class instead. (Note: the particular priest that pushed me over the edge became a bishop and then an arch bishop several years later, and has since been "retired" over child abuse scandals).
In 11th grade, I learned that a teacher can prey on, corner, and sexually assault students with little fear of recourse, because their word against the students' would always hold water.
In 12th grade, I was told that the next step in my successful "school career" would be to go on to college, so I could then pursue employment. I learned that not one of the more than seventy 19-year olds graduating with me even considered becoming a wife and mother as an alternative option.
In 13th grade, I learned that the primary purpose of a "senior trip" for many of my fellow students was to get drunk, sleep around, smoke pot, sexually assault other students, and generally make sure their life would derail sooner or later.
So there you have it. Yes, there were better moments in there, too, but they were more than overshadowed by the horrific things I won't even include in the above rundown, because they are just too graphic for my mixed audience. It was much too great a price to pay for the mediocre education I received in return.
Something tells me things have not improved since I started school over 25 years ago.