ok, i've been trying to figure out the name of this movie for years it's at least 13 years old of not a little more.
pretty positive it's australian.
teacher and her students (like of all ages from like 5-15, i guess it's a 1 room schoolhouse but it's not like set in an old time period. it's "current" for the late 80's early 90's or whatever...) are for some reason being chased around the outback by a buncha murderers in clown masks (i'm pretty positive at least the main bad guy has a clown mask on) anyhow the students and teacher at one point are escaping the bad guys through the back of this cave and so the oldest are helping the little ones and there's this weird moment about them all being naked. and at the end of the movie the teacher and her students set up this big trap and end up killing all the bad guys. at the end of the movie this cop is like "blah de blah and for some reason we couldn't find *main bad guy's* heart, looked like it was ripped out...." and the last shot of themovie is the heart in a glass jar at the back of the class.