Introductions
"My name is Mr/Mrs/Ms Kim. I'm your new English teacher/ I'm your English teacher this year/ this term/ today. (Can you ask me some questions, e.g. where I'm from and my free time?)"
"I'll just introduce myself first"
"I've got five lessons with you each week."
"I'm covering for your usual teacher (today/ this week). He/ she has a cold"
"I'm new to this school, so please be nice to me, ha ha!"
"Your last teacher told me you are the best class, so I hope that is true!"
"Can you all introduce yourselves to me?"
"Can you tell me and the rest of the class two or three things about the person sitting next to you?"
"Let's introduce ourselves, shall we?"
"This is my name at the top of the board, it's pronounced..."
Waiting to start
"I'm waiting for you to be quiet/ to settle down/ We won't start until everyone is quiet." [cross arms and look impatient, maybe tapping foot]
"Please stop talking and be quiet" / "(Can everyone please) settle down so we can start." [arms out with palms down, moving slowly up and down]
"(Everyone be) quiet please!" [index finger in front of lips, or zip across lips with thumb and index finger]
"Okay, I'm glad you're excited, but let's calm down a little, shall we?"
"Yes, okay, we'll play the Stations game, but you have to sit down quiet and then doing the normal greetings first."
"I'm still hearing some noise at the back"/ "What's going on back there?" [stretch your neck and/ or stand on toes and look in that direction]
"We have the same thing every week. What am I waiting for?... For you to be quiet, that's right."
"They'll be plenty of time for speaking/ games once the class has started."
"... or would you prefer to start by checking your homework instead?"