There are many different standards that teachers must address! This can often be overwhelming. All educators teach Common Core, 21st Century and TPACK standards. Mathematics teachers also have NCTM standards and there are many more subject-specific standard sets. There are many more standards than this used to design lessons for students.
I think of these various standards like cooking. Many of these standards work together and often enhance each other just like ingredients that are mixed in a bowl. Educators are constantly working with standards and adapting them to fit student needs.
I am fortunate that I have remained teaching Honors Math 3 for many years in a row along with classes that are above and below this grade level. This has allowed me to develop a deeper understanding of the foundations and the ingredients that make up this course as well as where students will be headed with the content in the future.