. . . . . . . . . . . . . . . . . "Ruling principle of method applied to education" . . "Ruling principle of method applied to education"@en . . . "The ruling principle method applied to education"@en . . . . . . . . . . . . . "The ruling principle of method applied to education"@en . . . "The ruling principle of method applied to education" . . . "Education." . .