About the book: year / Essay on teaching mathematics in secondary school. Although the essay is about the American modern high school, many of the problems Lockhart identifies apply to every country in the world, except perhaps El Dorado, which is not. Even less tied to American reality are the author's thoughts about what mathematics is and how it should be taught. Even if you are not a mathematician and have nothing to do with teaching, you will find this essay interesting, and perhaps make a few small discoveries for yourself and break some stereotypes. After all, you studied math at school.!