Steven Krantz has produced here a serious reflection on a traditional approach to teaching and learning, specifically mathematics teaching. A mandatory reading for every math teacher concerned about the pedagogy of this subject.
The book is directed primarily for graduate students or novice instructors preparing to sumerge in the teaching world. It also may be of some interest to those who have been teaching for a few years. It's important to acknowledge that teaching will improve if it is subjected to periodic re-examination.
Krantz is a college professor, so the book is basically oriented to university level teaching. I am teaching myself in a high school, thus I had to adapt everything the author states to the level I am interested in. Besides the environment is clearly an american one, and I am european (from Spain), so here I had to adapt a lot, as well.
Krantz is a traditionalist, but one who sees many merits in the reform movement. In this book, he provide us with some tips, advice, and the benefit of his own experience. He does not tell us how to teach, we have to decide ourselves. He intends to sintetize to us certain issues attendant to teaching.
He states that nothing he says is essentially correct in any absolute sense, for there is no "correct" position in teaching topics. There is more than one way to get the job done. However, what I found of great interest in this book is that it is specific about issues that arise in the teaching of mathematics. Something not very usual in literature, where you can find much more bibliography about general pedagogy and education.
I quote him saying «the fact of having sat in a classroom for most of your life does not mean that you know how to teach». You really realize this fact whenever put in front of your own students for the first time. We, mathematicians, are not taught almost anything abot what constitutes teaching. I only took a six month course about teaching prior to my first job as a teacher. And it was of little use, for it was scarcely practical, too theoretical. Reading this book provided you with better information and a better outlook. I would have thanked it some years ago, when I was going to begin teaching. It would have been a fantastic reading during my teacher training, complementing the theoretical classes with more applied technics.
The book was written in 1993, and the second edition (the one I have read) in 1999. He has invited some professors who have different views of how to teach maths to write short pieces for this second edition. Something like the two fifths of the book are devoted to these pieces. They amplifiy and complement Krantz's opinion.
Having reading it almost twenty years later suposses that some issues are somewhat outdated, for instance the use of computers with educational goals. Nevertheless, I agree with Krantz when he says «use of computers should be based on a foundation of conceptual and technical understanding».
I also agree with him when he judges Mathematics as a hard subject, and every teacher must have as a goal not to make it harder for his students. «Do what works for you and for your students».