In olden times, Christian schools in Canada were run by private Protestant or Catholic organizations. After some years, public education developed and the majority of Protestant faith became represented by the public school, in the other side minority faith which was usually Catholic became represented by a separate school. Eventually the public schools became gradually more secularized as Canadian society became pluralistic. A large number of provinces had separate school boards in each school district for Catholic and non-Catholic students. Most provinces have eliminated this except Ontario, Alberta and the Northwest Territories retain the system. As a result, the 2 schools systems are usually called the Catholic School Board and the Public School Board.
In United States of America, normally religion is not taught by state-funded educational systems, though schools must allow students wanting to study religion to do so as an optional activity, as they would with any other such activity. More than Four million students, about one child out of twelve, go to religious schools, in which most of them are Christian.
The biggest system of Christian education in the U.S. is operated by the Roman Catholic Church, in which more or less 7,000 elementary as well as secondary schools enrolling about 2.2 million students.
The Lutheran Church-Missouri Synod runs the largest Protestant school system in the U.S. The LCMS operates approximately 1,400 Early Childhood Centers, in addition of over 1,000 elementary schools, 100 high schools, 10 universities and 2 seminaries. These schools educate more than 0.28 million students & are taught by thousands of teachers.
In the United State of America the Episcopal Church maintains approximately 12 hundred schools, of which about 50% are secondary schools, educate about 2% of all students in private schools or 0.22% of the school population in the U.S. while there are comparatively few Episcopal schools which are far more likely to be independent. Many schools, like the Groton School in Massachusetts & St Paul's in New Hampshire have played a vital role in the development of the American prep school.