If I ever have children I will not send them to a school. If I could afford a very good private day school and was completely satisfied with how it operated I might consider the possibility, but even then I doubt that I could be persuaded. Most of the following is about state schools, but it is to be understood that many of the points apply equally to private schools.
Schools are not very good at what they do, and what they try to do is not what they should be doing. When a massive bureaucracy uses enormous amounts of tax money to construct a conceptual edifice which gives it almost complete control over all children, all parents and all taxpayers you can be certain that its sole interest is in increasing its budget and its power, and it has long forgotten that it ever had any function that involved the good of children.
The original aim of tax-funded education was forgotten almost as soon as the system was created, and the result is that children waste their youth herded into smelly, half-ruined rooms listening to people telling them things they will never need to know, telling them what they must believe, what they must be, who they may like and who they must hate, or just inventing pointless activities to pass the time until everyone is allowed to go home.
What children need to know can be learned in a couple of hours a day over a fairly short period of each year. And there is no need for schools themselves, they have long been obsolete, but no one cares to notice this because too much depends on maintaining the fiction that it is all essential. To many people it is, but not to the children.
Children do not need to be taught together, they do not need to be taught most of what they are taught, they do need to learn many things which are ignored, and they lose the chance to become properly socialised, and to learn to take their place in the world, in a natural environment, because they are forced to spend their days in a highly unnatural, unproductive environment invented by socialists.
Some would need or want more time, broader or deeper content, a different approach, and it can and should be provided. Some children cannot benefit from education because they are incapable of learning anything much that will be useful to them in later life, and certainly not at the rhythm that collective education requires. Some children don't want to be there and the efforts to convince them that they need to learn are a great distraction. (Let their parents convince them. If they can't, why should anyone else have to?) The standard model, in short, forces teachers, and the education system in general, to waste an enormous amount, perhaps the majority, of time, energy, and reources, not to mention the patience, goodwill and opportunities of the other students, on children who can't, and who don't want to, gain any appreciable benefit from that effort. This model simply guarantees that all children will waste many hours a day for the whole of their childhood, for no reason that benefits them.
In short, schools are an outdated institution, they try to do far too many things at once, many of which they are very poorly suited to, and most of which are of little benefit to the people who they are supposed to exist to help.
I would never subject my children to that.