schoolgirl explaining to his classmates the functioning of body humant thanks to a dummy skeleton

academic adult anatomical anatomy assisting bench biology body bone boy boys casual caucasian child childhood classmate classroom clothing desk development discussing education elementary ethnicity explaining female girl girls group guidance holding human indoors information innocence intelligence intelligent interacting kid knowledge lifestyle looking male man mature medium men mixedrace model of people person school schoolboy schoolgirl schoolteacher science showing sitting skeletal skeleton standing student talking teaching together touching wisdom