Not to be an ass but I assume the "was" in that statement was not due to protocol getting in the way of teaching children?
If you are talking about me being a teacher previously, it was because I pursued other opportunities.
I loved the kids (despite the daily craziness of working with emotionally distrubed population and constant threats of violence) but it also left me depressed a lot of the time.
Kids came from broken homes, they were mentally and physically abused, sexually assaulted, addicted to drugs (from birth in some cases), etc. It is a really thankless and demanding job. I felt like I did my job and it was time for me to leave, I made a positive impact on a number of students that many thought had no hope and no future besides being in prison or dead on the street.
I am still in touch with those students that I impacted positively. Part of the reason why I was able to impact those students, I would imagine, is because I followed "best practices" and modern behavioral intervention theory, which involved me teaching my students even when they were violent and destroying the classroom, and not abandoning them by forcing them outside of the classroom unsupervised. Teaching isn't just about academics, especially for students with behavior problems.
Will the kid learn empathy, compassion, understanding, or any other positive thing from being outside the classroom unsupervised?