Personally I don't think drug testing is necessary. Sure it can tell you who is and who isn't doing drugs, but its really not going to prevent people form doing it. Also drug testing can provide positive results for things that aren't even drugs such as simple Poppy seeds. The fact is, they aren't entirely accurate and cant even detect every illicit drug that one does. Many students are clever and can find their way around the system and can prevent themselves from getting caught, if they do their research. Drug testing does not prevent people from doing drugs. It only allows the administration to know who and who isn't doing drugs and i just don't find it necessary. Its quite pointless and therefore does not make any difference in a school and the amount of students who do drugs.