This could maybe be considered a bit off-topic, so if that's the case, feel free to either remove or move this reply.
The first thing that comes to mind when thinking of horrible books from school isn't literature in the way as it is fiction. What I'm thinking of is a "educational" book with very biased opinions and non-grounded so called facts from the author. It was the kind of book you have in school where every 5 pages or so there is a assignment based on the pages you had just read.
We worked with this book in my second year in high school, so I was between 17 and 18 years old I think. I studied culinary arts in high school, and this book was about the different ways people run restaurants and described situations and events you can expect to encounter while working as a chef, waiter or bartender. In short, it was a quite important and interesting course, that would have been good if it wasn't for this book and our oblivious and uninterested teacher.
First example: The book described and compared the ways restaurants is run to different ways a country is run, for example democracies, dictatorships and fascism. Many of these comparisons were valid, and the similarities could be understood. The problem was that when describing democracy and dictatorships they were described as polar opposites, and not in the way that you would expect. The book described democracy as a guaranteed paradise that honored the residents/employees rights and opinions. Nothing could ever be bad in a democracy, because the people are respected and they can live/work freely. While describing a dictatorship, the author's opinions and unresearched facts started showing up. According to the book, the wording was something along the lines of: "Dictatorships is ruled by a singular person, the dictator. Dictatorships will suppress the people and will not shy away from using force and violence to keep the people in line." Now, I will be the first to admit that this might be the case in a number of demoracies and dictatorships, and that the ladder may not be an optimal way to run a country. It is however, very biased and uninformed to say that dictatorships use violence as a way to control the country/workplace, without exceptions. When a country/workplace ends up using violence, it is not an effect of the way it is ruled, it is an effect of how the person ruling is. When i asked my teacher about it, my answer was something along the lines of "Don't read into it too much." Teaching yaay
Second example: This was one of the assignments that came up every so often in the book. It started by painting up a scenario, and I will do my best to recreate it for you:
You are working as a head waiter at a popular restaurant, and it is friday afternoon, so you are expecting a busy evening. However, one of your employees has been taking 8 reservations from people calling in, even though you only have 5 empty tables. The problem is, your employee has not been keeping notes of in which order the calls has been made, and it is therefore impossible to tell who called in first.
The book then lists the 8 companies that have booked a table. The companies varies in size, age, living situation and ethnicity. So for example one of the companies is Mr. Brown, CEO at a succesful accounting firm, he's bringing his wife and 17 year old son. Another company is The Gray family, immigrants from another country, where the father works at a local car wash, and one of the sons has a criminal record.
The assignment asks us to decide which 3 companies that we will exclude from the restaurant, and give arguments as to why you have decided to exclude these.
This assignment was given to us as homework for the week. The assignment has nothing to do with learning, it was a way to detect the prejudices and opinions the people solving it has. When I worked on it, I showed it to parents and friends and they would all say the same thing: "This is stupid." So when I came back next week when we were to demonstrate our answers, I simply said what I thought: "The first 5 people to show up will get a table. The fact that we even have this as our homework is --- stupid, and the fact that you (the teacher) don't realize that it is nothing to learn from this other than which of our classmates has different opinions about other ethnicities is honestly shocking."
The answer I got?
"That's not an answer. Come back next week with a proper answer."
I came back next week, even angrier with the same answer. And my techer just dropped it and said we are moving on to the next chapter, even though not all of us seemed to "care about the homework". Great teacher
So yeah, even now, around 5-6 years later, this still upsets me. It was a truly terrible book, and a truly terrible teacher. Angry rant concluded.
And yes, if you think that I'm wrong and that I'm being the bad guy, please let me know, cause I think we all know that we don't really think straight when we are angry.