After years of learning that lecture is almost completely ineffective, I had to do it anyway because the system is fundamentally broken.
Not only is lecture scientifically ineffective, but students can watch for free on YouTube or Khan academy the best lectures ever given on a subject, at their preferred speed, format, time, and location. Lectures that are animated, drawn, rewindable, and humorous. But I had to give the lecture anyway. Live. The same lecture three times a day to my three different classes. And we were graded by the administrators at how well we performed those lectures. We were even made to write them ourselves.
Imagine being an actor forced to write and perform a play three times a day that no one in the audience wanted to watch, and you knew for a fact was a waste of their time. But your bosses and the audience's parents demand it anyway. It's hard not to grow extremely cynical about the whole affair.
Then there are mandatory state exams which are even more cynical. All our funding came from the results of those, so we were extremely stressed about cramming all year for those. Cheating by teachers was rampant, so the school tried to have us monitor each other, which only worked if you wanted to be hated as a snitch.
If a student was failing, it was my fault. I had to justify any bad grade given to a student. If I did justify it, I was then blamed for their failure. There was no reason at all to give bad grades to students.
--Trauma dumping time--
If you happen to be male, expect students to act extremely inappropriately as a joke. They know you can't really do anything about it, so students will do it to stress you out. This is extremely stressful. I was constantly sexually harassed by older students, and was terrified I would lose my job over it.
My first day at one middle school in Texas I overheard several of the other teachers questioning why was I the only male adult on campus in tones indicating they thought I was a pervert. They could not believe a male would want to teach middle school for any other reason.
It became hard to show up everyday fearing that I would get assaulted by a student and thrown in prison over it. I was extremely careful to always have witnesses around, which wasn't always possible as there was no separate bathrooms for teachers. At one point I seriously considered wearing a bodycam every day just to have my own evidence of innocence.
Then there were the bomb threats, hallway fights, and the fact that quite a few of the male 10th graders were bigger than me and violent. At least once a week there was a hallway fight. At least once a month we had to evacuate for a bomb threat.
So as a teacher, I had to write and perform a play every day that no one wanted to see, that was a waste of everyone's time, to students who thought it would be funny to get me thrown in prison, a few of whom were bigger than me and violent.
The public school system is completely broken. I left it and never looked back. I would never send my kids to a lecture format school system in a million years. I would send them to a democratic free school, Montessori, unschool, or homeschool. But our public schools (and most private schools that rely on lectures) are cynical systems designed to stamp out creativity, critical thinking, logic, emotional intelligence, and empathy. It is designed to make incurious factory workers.
Don't take my word for it, see the words of John Gatto, the famous NY State teacher of the year: https://cantrip.org/gatto.html
He wrote this in 1990! This was long before cell phones, porn addicted students, mass shootings, and drug abuse. When students could still be given bad grades!