How to start teaching mathematics to a 9th grader?

Question

Mathematics

Where do I start teaching mathematics, such as graph theory, dynamic programming, geometry, combinatorics, and especially discrete mathematics.
Of course, I was interested in this, I was looking for information, but it is very difficult to understand what is written there, because everything is written there in a dry mathematical language. Thanks in advance!

Answer 1

If you feel strong in yourself, then try to understand Courant's book "What is Mathematics?".
https://www.ozon.ru/context/detail/id/142250958/

Answer 2

I think it’s better to teach according to the School Curriculum, what is integration, derivatives taught there after grade 9? At the university, we started higher mathematics with matrices. It is better not to confuse topics in places, since one topic can pull others along and you will have to learn everything at once.

Answer 3

Yes, if you are interested in mathematics, start with linear algebra, with vectors and matrices. For example, according to this tutorial or this one . And be sure to solve problems, because theory without practice will not be assimilated.

Answer 4

Of course, I was interested in this, I was looking for information, but it is very difficult to understand what is written there, because everything is written there in a dry mathematical language.

That is why in the 9th grade they do not teach graph theory and discreteness. Because neither the baggage of knowledge nor the ability to assimilate such information is enough.
Study according to the school curriculum, then go to the university.