As I have said in a previous blog post: “Class-Yes” is a wonderful attention getter. However, it it okay to change it up once in a while. This keep things new and exciting for your students. The teacher still gives a command and the students have a punch line they say back. For example, Teacher: Ready to Rock! Class: Ready to Roll!
Here are some I use with my class: T= Teacher C=Class
T:Peanut Butter C: Jelly
T: Ketchup C: Mustard
Here is a poster from dragonfliesinfirst.com that I love! It has wonderful attention getters on it. It is a freebie on TPT.