Thank you all for your positive input. In the Netherlands we are wrestling with the same topics you are.
My wife and I wrote a book about trauma and attachment related problems in school.
In our research we found the following English/American literature very helpful:
Attachment in the Classroom - Heather Geddes
What about me? - Louise Michelle Bomber
Inside I'M Hurting - Louise Michelle Bomber
Teenagers and Attachment - Edited by Andrea Perry
Settling to Learn Louise Michelle Bomber & Daniel A. Hughes
Supporting and Educating Traumatized Students - Eric Rossen & Robert Hull
Treating Traumatic Stress in Children and Adolescents - Margaret Blaustein & Kristine Kinniburgh
In explaining this topic to fellow teachers we use the ACE material, this website, Bruce Perry's publications, Dan Hughes books, publications of Besel van der Kolk, and the three videos from the Center on the Developing Child (Harvard University)
Willem de Jong