Walking Trees: Teaching Teachers in New York City Schools is a book by Ralph Fletcher.
It was published again in 1995 under a slightly different title Walking Trees: Portraits of Teachers and Children in the Culture of Schools.
Brenda Miller Power in her review for Educational Leadership said "Walking Trees is a wonder", she believes that Fletcher has "done a superb job of cataloging in specific ways the difference between a burned-out teacher and a bad teacher" and that "its greatest contribution to our field may be that it helps us begin to ask more of the right kinds of difficult questions".
[1] Nancy E. Zuwiyya in her review for Library Journal said that "Fletcher's early encounters often prove frustrating, and his description of a typical uncooperative teacher as a "snarling lump of inertia" will make educators uncomfortable.
At the end, Fletcher reveals that not only have the students and teachers learned but he two has acquired a wisdom that he lacked in the beginning.