The National Association for the Research and Therapy of Homosexuality serves as a translation layer between the scientific and public sectors. Joseph Nicolosi was a co-founder and past president and is still the face or NARTH. They typically distort the science and ignore the science they don't like. Unlike other scientific organizations, they consider transgenderism and homosexuality sister illnesses with the same root causes and same solution: reparative therapy. They also believe both are entirely psychology and not biological and that therapy will resolve desires 100% of the time although real world change of behavior is around 30% and change in desire around 1%. While they bill themselves as non-religious, I have yet to see a non-religious person who works for them or a non-religious organization that uses them. Their main sponsor is Exodus and Neil Whitehead is a contributor.
Dr. Berger of NARTH teaches parents and teachers to allow children to bully and tease their transgender peers. NARTH has not condemned the teaching.
I suggest, indeed, letting children who wish go to school in clothes of the opposite sex–but not counseling other children to not tease them or hurt their feelings, On the contrary, don’t interfere, and let the other children ridicule the child who has lost that clear boundary between play-acting at home and the reality needs of the outside world. Maybe, in this way, the child will re-establish that necessary boundary.