Cornell Self-Injury and Recovery Research and Resources is a goldmine of information for families and professionals, including informational printables.
Info guides for families, school professionals, and mental health professionals can be found at SiOS.
Non-Suicidal Self Injury Presentation Katheryn Chaney, MSW, LCSW-S
Stress management strategies, stressors checklist: http://www.selfinjury.bctr.cornell.edu/perch/resources/coping-stress-management-english-1.pdf
Information for parents: http://www.selfinjury.bctr.cornell.edu/perch/resources/parenting-2.pdf
Talking to students about SI: http://www.selfinjury.bctr.cornell.edu/perch/resources/talking-to-studentsoctober-2018-.pdf
Distraction techniques/alternatives to cutting: http://www.selfinjury.bctr.cornell.edu/perch/resources/distraction-techniques-pm-1.pdf
Book: Cutting, by Stephen Levenkron