I'm a high school teacher too, and a mother of a son, so I can connect with Dewey on this one. And what a powerful book this was. I see several other people have selected this book as well, so I won't say too much, other than this was an amazing book. It took me about 100 pages to get into, because the mother is not the most likeable person, and it was hard to read what she said. She is brutally honest about herself and it can be uncomfortable. But nothing about these school incidents is comfortable.
Also, once some other people have read it, I'd love to talk to you about what happens in the book. There are lots of things to discuss in here, which should be what happens after a tragedy.
My full review is here at my blog