Cell phones should be allowed in school, only if they are turned off during school times. They are great tools when used properly. Many teachers will disagree, because cell phones can interrupt classes and lectures. Yet I will tell you many reasons why cell phones should be allowed in schools.
First of all, cell phones should be allowed because of emergencies. How many times have heavy rain and weather problems caused a block in your line? How many times have you tried to call home for a very important emergency that needs to be addressed immediately, yet the only available phone line is being used by one of the other thousand kids at your school? The cell phone is the answer to that problem. Just being able to feel that emergencies can be addressed immediately is worth having a cell phone.
Second of all, cell phones should be allowed because many parents are concerned with their kid's safety. Having a cell phone is the answer to that. Many parents want to be able to immediately alert their kids of changes, even if it is just a text message or voicemail. Many more parents feel much safer just because they know their kids are in their reach. Again, cell phones are the answer to that.
Last but not least, new technology is being created everyday. Are we going to ban all those? Are we going to constantly ban all technology because it could be distracting? The same is with everything, guns were invented on a purpose for protecting yourself, yet many people manipulated it to kill and threaten others.
The point is, all things depend on how they are used. How can schools ban something that only sometimes distracts teachers, and can be easily remedied? Say the school bans weaponry; that is not unreasonable, because it can be life threatening. Yet cell phones, our major source of communications are banned, and they can cause barely any harm, other than minor distractions.
You should now see that cell phones should be allowed in schools. Every situation in which cell phones can be distracting can be easily remedied. The good sides of cell phones outweigh the bad by far, so it is a good idea to lift bans on cell phones (if the teachers make sure cell phones do not cause distractions).