The children are finding it hard to adapt to the new school.
Is it right to say "The children are finding it hard to be adapted to the new school."? If it is, is there a difference in meaning between the two? Thanks!
No, "to be adapted" in your example would indicate that the adaptation is on the part of the school i.e that the school was having difficulty accepting/accommodating the children, whereas it is the children that are having the difficulty, as indicated in your first example.