This is what I did on my first day of teaching high school, and it went really well and worked for all skill levels.
Introduction: About me (the native teacher).
Discussion of hobbies and things I like to do (focusing on using the phrase, “I like to…”).
Game: Hot Potato with Words.
-On the board is the phrase "My name is ______ and I like to ________".
-Set a time limit (60 seconds).
-The student with the ball will recite the phrase on the board, filling in the blanks with the proper words.
-Once phrase has been recited with proper pronunciation (so long as the native teacher can understand), they may then pass the ball.
-Process will continue until time has run out. Student holding the ball at the end of time will have to wear a goofy hat (I used a large fedex envelope I had lying around) as the penalty.
*you can mix up the rules for more advanced students, like no one is allowed to "like" the same thing as another classmate.
While this may seem simple for advanced student, they will still get a kick out of it and laugh when someone has to wear the hat. Also, they were usually interested in learning about the new teacher.