During my 5 year teaching experience it became clear to me that most students had little understanding of mathematics. I tried to explain to them the importance of understanding math as one of the languages of engineering and science. Well, actually that would carry into business and other fields. So, I suppose math should be considered an essential language of an educated person.
I recently read a book I had started years ago, but didn’t finish then. “The Number Devil, a mathematical adventure,” by Hans Magnus Enzensberger. It is written for the elementary student, but I think many could benefit from reading it. It is a fun read about numbers and their relationship to each other. I think it’s goal is to stimulate curiosity.