My old school district does the same thing every year at the high schools.
Except it is a little more elaborate.
Beginning of the school day at every high school, a kid is called to the office every 15 minutes and dressed in full black, white face paint and black eye makeup. They are told not to interact with any student, but go about school as normal. They represent a teen driver dying from drunk driving.
Then at 1:00pm all the students are brought out into the parking lot where two vehicles are placed smashed together, and several students are laying out around the wreck covered in blood. The local fire department and EMS come in and carry the students off in stretchers. One year I remember a lifeline flying in and landing in the parking lot.
After this is said and done, the students in black and makeup are lined up behind the wreck and stare back at the student crowd as the principle gives a quick speech about drunk driving.