Well yes it is a learning fractions question. Pizza is not a number. Pizza is not a specification of size. It is absolutely crucial for understanding fractions, that a fraction of anything but two numbers will be factored by the size or whatever metric of that thing.

In the same wake you learn that "5" is not an answer to a typical physics calculation, as the unit is missing.

I was told in 6th or 7th grade science class that you can't hear underwater

You can't teach if you don't identify where the students are getting things wrong and correct them. It's one of the major reasons why teachers deserve so much more pay. My wife used to be a teacher, and she worked 2-3 hours past the end of school correcting students' work pretty much every weekday, and spent several hours every weekend planning out her lessons for the following week. She got paid significantly less than me working in a basic entry-level 9-5 office position.

How are you supposed to learn if they don't tell you how to do it better? Not writing corrections seems like bad teaching to me.

One of my teachers demanded we fold our paper in half and leave one half empty for his corrections, another one demanded a third of the page, and the rest squeezed their comments on the edge of the page

This happens all the time, at least in Germany. My teachers did it, and I do it too.

The picture is probably still ragebait.

Some people become teachers because they love to educate children.

Some people become teachers because they have no control in their life and want to be the boss if something.

I was once called down to the principal’s office and told I would be expelled from my Catholic school because in spite of my catholic upbringing, I was an atheist (in the US, at a time when this was obviously illegal, given that the school accepted non catholic students of other religions). They called my dad and had me wait in the hall outside the principal’s office. For context, my dad’s an agnostic who doesn’t harbor any positive views towards the Catholic Church, but is a huge fan of educators and would always side with the teacher, no matter how unfair they were being.

My dad went straight in without acknowledging me and spoke with them inaudibly for about a minute, before the secretary came out and sent me back to class. I never heard anything about it from the school again and when my dad got home, he just said I didn’t need to worry about it. Decades later, he still won’t tell me exactly what happened, but I honestly think he might have forgotten and doesn’t want to admit it.

Das ist echt krass xD Dein Papa hat vollkommen Recht