I live in a country which has textbooks for every subject and they come home every day . There are things I would change about the education system here, but I really really appreciate the fact that proper textbooks are used.
1/ It massively reduces the lesson-plannign workload for teachers, which in turn means that teachers can spend more time working with struggling students one-on-one, or in very small groups. This in turn makes it easier to teach the classes to a single level.
2/ It means I can see what she is actually studying. You have no idea how much easier this makes things. I have a record of what she has done, I can look ahead and see what will be coming up next, I can pre-teach stuff during the holidays to prepare her. I can go over things if she is not sure about something she did in the lesson. I can see what techniques she has been taught.
3/ It supports children with language issues. My daughter was a little behind in the national language when she started. It was helpful to be able to take out the textbook and go over stuff with her, if she missed something in the classroom. Some of my friends whose literacyin the national language is not great have found this esp helpful, because it helps them learn along with their child.
4/ It is a simple structured way to create a standardized detailed scheme-of-work curriculum which ensures that all kids cover the same material in the same schools.
My friends back in England send their kids to various schools. Because I am a nosy cow, I've looked at the curricula/SOW for their various schools. They are all over the place. One school will do history as a series of ages/periods, another does history in "themes" (chocolate, pirates, whatever), another does combined history/geog type thing, another does NO discrete subjects apart from English, maths and PE etc.--everything else is collapsed into "topics."
I am trying to imagine the flipping mess that the Key Stage 3 teachers must be faced with when they have all these 11yos from different schools who have all studied these completely different random collections of bits and pieces. How can you teach any class in KS3 history when for any topic, 1/3 of the kids will have done it already (= bored), 1/3 of the kids won't have enough background knowledge to be able to make sense of what you are talking about (= also bored)..... No wonder KS3 tends to be such a mess and is often openly described as the "lost years" when education in England is under discussion.
Needless to say, kids in "nice" state schools get to study the more rigorous history curricula. Kids in the less desirable primary schools get dumbed-down "fun" history that is heavy on the chocolate and the pirates etc..
5/ Fewer random shitty worksheets coming home. Amen to that.