I am writing a story and it is about this maths teacher who is really annoying.

she is teaching the class.
what dialogue can I use to put in my story which makes the class get even more bored?

Write dialogue that bores you.

(I'm a teacher and can't imagine a boring teacher. <g>)

already got one

but good answer!!

In order to create dialogue that reflects a boring math class and makes the class feel more bored, you can use repetitive and monotonous language, along with mathematical terms and concepts that may seem mundane to the students. Here's an example:

Math Teacher: "Today, class, we will be exploring the captivating world of algebra. Please turn to page 42 in your textbooks. Now, let's solve equations with variables. Remember, an equation is a mathematical statement that demonstrates equality between two expressions. We start by isolating the variable on one side of the equation. Who can tell me the first step?"

Student A: "Um, move all the constants to the other side?"

Math Teacher: "Precisely, Student A. We transpose the constants to the opposite side of the equation to isolate the variable. Then, we proceed by inversely operating on both sides. Now, let's indulge ourselves in solving this fascinating equation: 3x + 7 = 16. Please work quietly and submit your answers once you have completed your mind-numbing calculations."

Student B (whispering): "Ugh, more algebra? I'd rather watch paint dry."

Math Teacher: "Excellent analogy, Student B. Now, remember, we must follow each painstaking step. Distribute, simplify, combine like terms... a never-ending endeavor. Oh, the beauty of mathematics!"

By incorporating repetitive phrases, emphasizing the intricate steps of solving equations, and maintaining a monotonous tone, the dialogue above aims to convey the boredom felt in the class. Feel free to adapt or modify the dialogue to suit your story and characters.