Very informative and educational video. The terminology and vocabulary used are meant for very young learners, such as 2nd or 3rd grade. The video does not go into much detail about how the bones actually heal, but instead talks more about why casts or slings are necessary. In order to appeal to 4th or 5th grades, the host could speak more about the type of cells or tissue inside that bones that allow them to heal, or they could explain the healing process in more depth.