First, I spelled 'explain' wrong in my post.

Here are some other tidbits of information I've learned over the years (I've subbed for 3 years total)
1. Don't act like a know it all You-know-What when you enter the room. Be firm, but nice. Kids will just know it is a cover up and run all over you. The opposite is true, don't be overly nice like their friend.
2. Ask one student if you have a question on how something is done, not the whole class ("does anyone know...." BIG NO NO). If someone else answers, tell them politely that you didn't ask them, and redirect the question to the student you asked. This keeps you in control.
3. Tell children not to raise hands with questions until YOU ask for questions. Raised hands while you are giving out directions or explaining something can be very distracting. I always lose my train of thought when I see hands pop up everywhere.
4. When kids say, 'Mrs.....' doesn't do it that way, say, 'but I'm not Mrs.... and we're gonna do it do it MY way. (be polite of course)
5. You will soon realize the 'one' that will be ADHD/defiant. Go out of your way at the start to encourage him/her, have them be a helper, or ask them questions you have. Many times these kids, if given respect and love, will open up like flowers and be your best kids. And many times these children don't get love and respect at home, very sad... If children tell me, "oh that's _________ he/she always gets in trouble." I tell them, "I don't know_______ and for all I know he/she is a sweet child and probably won't give me any troubles." Usually kids will say this right in front of the troublemaker and I will look over at that child and say, "right? I don't even know you do I? For all I know, you're probably the best kid in the class, huh?" This has worked wonders with me in the past. There have been very few times this has backfired on me. Every child has something that can be praised (even if it is a stretch for some).
6. If kids are talking while you are, ask them to be honest and put their names on the board. Especially if you know who was talking. Tell them you want them to be honest. Most of the time when honesty is mentioned the ones talking will fess up and write their name on the board. If they don't, tell them you know who was talking and if they don't do it now they will get in trouble (a check by their name) for being dishonest. Those with checks get reported to the teacher. Thank the kids if they fess up for thier honesty, tell them you are proud of them.
7. Assign a bathroom monitor for the boys and girls when having a group bathroom break. In front of everyone tell them to be honest in their job and tell everyone that you will believe only what they report, that you won't even listen to what anyone else says as you know that the monitors are going to be honest. This usually works well.
8. For bathroom emergencies, have kids sign out on the board to go to the bathroom. I write: Restroom and write boy: girl: and only one can leave at a time. They erase their name when they get back. This helps me as I don't have to stop the class to say yes or ask if it is an emergency. It also helps if there is an emergency I can look on the board and know where that child is. this is especially true if I don't know thier names. I forget who I've said could leave the room.
9. for minor boo-boos it is amazing what a wet papertowel will do to make them feel better, headaches as well. If a kid really seems sick, send him/her on to the nurse. I've even pulled another kid over and quietly asked if the other one goes to the nurse alot. If they say no, I will usually just let the other kid go.
10. Try at all costs not to punish the whole class for the behavior of the few. It is horrible to be the good kid and get punished for someone else being bad. The good kids cannot control the behavior of the bad ones. For me it is better to miss out on punishing a bad kid than punish a good one. Many times I will name or point out as many of the guilty ones that I can and punish them. I will say, "I know there's probably more that need to be punished, but I don't know exactly FOR SURE which ones. The ones who 'got away with it' this time have to live with themselves and live with their conscience. I'm sorry, but I don't want to punish the innocent ones in here. It's not fair to them" It's amazing how when honor comes in to play how many will often fess up.
11. If a kid won't do his/her work, say, "it's okay, that is YOUR choice. You will have to pay the consequences when your teacher gets back. You know what she/he expects from you and you know what your parents expect. You just have to be quiet for the rest of the class or you will have to leave." There is no way we are going to be able to force the kid to do the work, don't waste your time arguing with him/her. You won't win.
12. If you have kids of your own, treat them all like your very own. You know sneaky your's can be? Well these kids are just the same. Sometimes sarcastic light humor works wonders. Like I had a boy put a plastic roach in my hair or on my shoulder (my son does this with my pillow all the time

). I just looked at it when it fell off and said, "Sweetie, I've got 4 boys..., you're gonna have to come up with something better than that if you're gonna get me." It was quite cute.
13. To get kids quiet I will say in a low voice, "if you can hear me do this.....(raise your hand or something), if you can hear me, do this... (do something else like raise your other hand), If you can hear me do this... (put your hand over your mouth), If YOU don't have YOUR hand over your mouth right now, put your name on MY board." This usually will work by the 3rd command.
I'm sure I could think of other tricks for classroom management that work for me, but it's late now. I hope you all have a nice evening.