Present them with a hypothetical (either on skype if language is good or via email) that tests this. For example, "Larla, dear Sebastian has his trumpet lesson after school today. What steps do you need todo to make it a successful day?" Look for answers that show she is thinking through things, like whether she asks whether the lesson is a school so he needs to bring the trumpet with him in the morning or if she should bring it in the afternoon bc its somewhere else.