There have been several discussions in this site about whether ACES screening by school personnel is appropriate. See this link for additional insight.
Here are several things to consider before launching any ACEs screenings. 1 - In the U.S. we have laws that prohibit surveying children without parental consent. Parent permission is not just a curtesy, it's federal law. I posted that information in the conversation link above, if you want to read the details there. 2 - I agree with Doty. Having worked in education for more than 30 years, I can tell you "screening" for Adverse Childhood Experiences is not like screening for developmental delays or reading difficulties. Trauma-informed practices should be learned and implemented by all school personnel as these are habits of perspective, interaction and relationship-building for all the adults working with children and not a "service" to provide students with ACEs - which by the way, research indicates is upwards of 64% of our children on average have at least one or more ACEs. 3 - Another thought to consider, how likely are the parents of children who may have been neglected or abandoned, witnessed domestic violence, been physically or sexually abused, and/or experienced community violence and police activity - how likely are these parents to report this trauma to school personnel who are mandated reporters to Child Protective Services? 4 - Trauma can happen to a child two-weeks after a "screening". If a school relies on screenings to determine who "gets trauma-informed services", how would anyone know that a child who previously "screened" with an ACEs score of zero, now had an active trauma? How likely is it that screening will be helpful to anyone, least of all the child? 5 - In reality, there is no such thing as "trauma-informed services". There is only mental-health providers who are licensed to treat children with trauma and there are school teachers, principals and counselors who are trauma-sensitive in their practice of providing a safe school learning environment. ALL schools and classrooms need to be a trauma-sensitive environment. School professionals don't need to know the details of a child's trauma to provide this. If your school personnel have not been adequately trained in the practices, your superintendent should not approve any "screenings" for ACEs, as screenings do not make for a trauma-sensitive environment. Hope this has clarified the issues and helps your school meet it's goals.
I applaud you for seeking input from others in this field before embarking on a plan of action. Best wishes in your future endeavors.