Paragraphs 263 through 267 address the ethical formation of children. We might look to other adults to teach our children math, science, foreign languages, sports, music, and dance. But beyond the education of a mind is the formation of a person. Teaching a young person what is right and just is a matter not of infusing the mind with correct behaviors. This goes beyond education. The responsibility, like it or not, is that of a parent:
263. Parents rely on schools to ensure the basic instruction of their children, but can never completely delegate the moral formation of their children to others. A person’s affective and ethical development is ultimately grounded in a particular experience, namely, that his or her parents can be trusted. This means that parents, as educators, are responsible, by their affection and example, for instilling in their children trust and loving respect. When children no longer feel that, for all their faults, they are important to their parents, or that their parents are sincerely concerned about them, this causes deep hurt and many difficulties along their path to maturity. This physical or emotional absence creates greater hurt than any scolding which a child may receive for doing something wrong.
For your reference, remember that Amoris Laetitia is online here.