https://atoday.org/study-of-education-outcomes-places-adventist-schools-significantly-ahead-of-public-schools/
i can testify that in the adventist system, we are all required to be certified to teach in an adventist school. because we're a private school, it is not a requirement for us to have a state teaching certification, though we are welcome to do so (and many have). we have our own requirements that mirror what public educators are required to do, and we have to renew our credential every 5-6 years via continuing education, higher education classes, summer school, webinars, professional development, etc. You are misinformed if you think otherwise, at least for our system.
i also want you to know that we do not ignore history and science. we approach the beginning of life from a creationist viewpoint as that is what we believe, but we also teach about evolution - the primary difference being that we don't believe life came into existence randomly or by chance. if you would have visited my class when i taught science, you would have heard exactly that.
sometimes your conclusions really concern me.