Mobile phones in school should be banned

My opponent writes, "First of all, when we are talking about that phones should be banned I assume that mobile phones shouldn't be in school at all. This means phones can't cross school doors." My opponent mistakes me. I am not arguing that students should not bring cellphones on school grounds at all, but that cellphones should be banned from the classrooms themselves. Having cellphones in their lockers is not in any way detrimental, and gives the students an easy form of communication with their families; it is only when the students bring the phones into class that the potential for abuse arises. This eliminates my opponent's arguments 5 and 6, since there is no disagreement there. We agree that in emergencies cellphones are very useful, and that as a form of communication between friends they are handy. We disagree on their use in the classroom, however. 1.) Calendar Assignment books or notebooks are the typical way of taking these notes, and they work perfectly well. While a cellphone can be used to take these notes, the information can also be put into them outside of class if the student desires an automatic reminder. The slight convenience of inputting directly in class does not outweigh the drawbacks of allowing cellphones in class. Besides, if you receive a text message while the teacher is giving out the assignments, you may miss the assignment altogether. 2.) Information The information the students need is typically provided by the textbooks, or from the school library. He does not need to be able to look up information during the quizzes and tests, because that is cheating and ruins the whole purpose of the test. If the teacher needs internet access during the lesson, nothing says they cannot have a computer with them to look facts up instantly. The information on the internet is largely unreliable, and should not be used to replace the lesson. Students ignoring the lesson to look things up on the internet is not an advantage, and is not a good reason to allow cellphones in class. 3.) Playing games or listening to music No-one is saying students studying at home cannot listen to music. While in class, students should be listening to their teacher, not zoning out. Ignoring the lesson because you cannot hear it negates the whole purpose of education, and should not be encouraged. Playing games during the break is fine; being able to surreptitiously play videogames during class is not.4.) Calculator Handheld calculators are cheap and easy to use, typically much easier than calculators on cellphones. They cannot send or receive distracting text messages. They cannot play distracting music. They cannot be used to record the answers for a test and help students cheat. In all respects, simple handheld calculators are superior to cellphones for use in class. Defence of my arguments:1.) Cellphones distract students from the lessons and 2.) Cellphones with cameras and/or Internet connection aid students in cheating on exams and quizzes In response to both of my arguments, my opponent argues that students abuse cellphones in class because teachers allow them to. He claims that they are useful tools as calculators and internet connections, but lax teachers permit students to use them to cheat or ignore the lessons. As I have established that cellphones are not needed or particularly useful as calculators or internet connections in class, and that in fact it is harmful for them to be used as such, all we are left with is lax teachers. I agree with him here; a lack of strict enforcement against cellphones in class is exactly the problem. That is why I am arguing that cellphones should be banned in class. I return this debate to my opponent with my thanks.