get in a chemical shower and don't touch anyone until its completely off you.
Completely rise off the area that was spilled on, if spilled on clothes take them off, and get help/assistance right away
it costs about $70- $80
It depends on what type of chemical. If it is water or something non reactive just wipe it up. If it is potassium chromate, mercury, or calcium metal, it requires a hazardous waste team to clean it....
if a chemical spills on your clothes then you should tell your teacher right away!