The National Council of Teachers of Mathematics is a group of people who really like math and want to help others like it too. Think of them like your teacher or helper when you are trying to learn math in school. They have a big group of people who work together to come up with ideas and good ways to teach math to kids like you.
The National Council of Teachers of Mathematics wants to make sure that math is fun and interesting for everyone. They want to help you learn math in a way that makes sense to you, and also so you can use it in the real world. They like to share their ideas with other teachers so that they can teach math in a way that is helpful to you and other students.
It is like they are superheroes for math, making sure that you and other students get the right tools and strategies to become math wizards! So, if you ever need some help with Math or want to learn more about math, the National Council of Teachers of Mathematics is a group you can look up to!