There is an interesting book on Comenius that explains how his method was to be used (Vestibulum, Janua Linguarum, Atrium, Orbis Pictus, etc.).
What struck me is how inefficient the most progressive method of the day actually was. Comenius envisioned students reading his Vestibulum the first time without actually understanding a word. Little by little, they would learn by rote the meaning of words, and with immense toil and suffering, students would eventually learn Latin accidence, almost as an afterthought of memorizing thousands of words, and move on to reading simple sentences in the Janua, and start the whole process over again.
This and methods like it were generally employed up until the 19th century. Boys would learn the entire grammar by heart without having ever read any Latin except isolated pairs of words, not even simple sentences. Eventually, when all the grammar was learned, they would read dialogues from Corderius, for instance. Boys would spend 6-7 hours a day, six days a week, learning grammar for up to seven years to learn what a modern student learns in a first-year university course.
I believe in the virtues of traditional education, but this is just ridiculous.