Dear Dr. Ayman.

Please, find here some easy notes in mathematical modeling.

It all depends on what students you teach. Some general suggestions:

https://www.elsevier.com/books/principles-of-mathematical-modeling/dym/978-0-12-226551-8

https://www.crcpress.com/Mathematical-Modeling-Models-Analysis-and-Applications/Banerjee/p/book/9781439854518

Chapter Mathematical Modeling and Simulation: Introduction for Scien...

https://www.crcpress.com/Introduction-to-Mathematical-Modeling-and-Chaotic-Dynamics/Upadhyay-Iyengar/p/book/9781439898864

Dear Ayman,

It depends on what do you want to do

look at

http://libgen.io

type "mathematical modelling + year".....Allow you to do search for a specific year

you will find many books according to subjects descending from 2018 to ....

Thank you Prof. Yuriy V. Rogovchenko for your kindly help.

Dear Prof. Hassan El-Nashar

Many thanks for your advance. I will use this link

There is no best book, it depends on the subject you intend to discuss.

I will be attaching some files much later.

I know "Model Building in Mathematical Programming" by H. P. Williams which introduces effective modeling methods and tips in mathematical programming