You should email me to see my past school notes. They are self evident for how much bullshit school pushes but I think it might be a different experience than most people on here. I live in remote part of India.
Most of what people do here is just write down from book to a notebook word to word. The books are horrible too (some published more than a decade ago in subjects where relevancy matters a lot) with no clarification or update from the teacher. Standard examination is not useful atleast on a school level. Many schools allow people to cheat openly and some of them even change the written answers of students (they tell them to leave it blank if you don't know the answers). This happens till 9th grade. After which, schools have less power over grading but they still get to hand out some marks which they will do for every poor student anyway. The cut off rate is extremely low to pass (around 33%). And it's also blurry because you have reservation (affirmative action based on your caste) so the end result is different for each person.
To over simplify, take three variables. Assign 1x, 1.5x and 2x. Now calculate admission, job application (government), taxes, fees, etc rate for different people by multiplying by them.
Most schools run an after school program or similar where they help you train for the exam. Although, most of it is just giving out a sample paper to what will come in the school exams. Pretty much most students will go there if the school is rich or if it is poor, then they directly go to tuition under subject teacher.
Most schools in rural, suburban, etc are repurposed houses.
As for teachers, mostly fresh college students, mothers and people who are waiting to clear their government exam or similar. The pay ranges anywhere from 4k-20k per month (upto $310).
Periods are stacked in the most unproductive way possible. No breaks and are very short - 30-40 mins with too much subject/context switching.
Majority of kids will be abused emotionally and physically at some point. Indian schools have a mentality of class punishment so you get punished for something you didn't do often. Typical physical abuse include beating palm of your hand with a wooden or metal ruler, making you stand outside with hands up in the air or sitting in a chicken position. There are of course some extreme corporal punishments. That includes stripping (only boys), making you run outside on the ground (45C+) for hours, telling other students to beat you for being bad and public shaming tactics.
Kids are also indoctrinated with politics all the time. I mean, we have an hour long assembly to repeat how much we are proud of our country and india number one in the morning every day.
Parents usually have no idea about their own kids and are toxic (reason - poverty).
Given economic condition of India, income inequality, social mobility and unemployment. I don't think a reasonable person would wanna go through this. It's not like you are likely to have a first class life easily even if you somehow pushed your way through.
I can expand more but that's the general overview.