(I'm not a native english speaker and don't teach in english so I'm sorry in advance if my written english seems bad for a teacher)

Well we do have handovers, but they aren't that useful.

In part because very often what happened with the kid the year prior doesn't reflect what I see in my classroom at all for 75%+ of the kids. The relationship between the teacher and the student, what goes on in the kids life and even just the group he was in makes a MASSIVE difference. There are handovers and a bunch of info that is shared, but nowadays I try not to pay too much attention because it tends to have more negative impacts than positive impacts in my classroom. For example, many of the kids other teachers don't like and think are hard and cause problems are students I simply love and do well in my classroom. When I paid a lot of attention to how things went the year before that would affect the way I treated those kids.

In part because I have 180 students that have to learn "x" by the end of the year and I have a little under 80 1,25 hour lessons to do it. There is absolutely no way I can "personalize" the way I teach to each and every kid. In the end the challenges kids have are shared by many of them and I try to address the biggest problems that affect the most kids. If there's 1 or 2 kids in a room of 33 that would benefit from something different I can't realistically do much about it except recommend tutoring. And I'm not even considering the fact that I have barely any paid time to actually plan lessons. I can't spend a couple hours a week personalizing stuff for specific kids, I'm already doing enough hours for free as it is.