AS A teacher, John Comenius was well aware of the shortcomings of the 17th - century school system in which he worked.
शिक्षक होने के नाते, जॉन कमीनीयस को १७वीं - सदी स्कूल प्रणाली की कमियाँ अच्छी तरह मालूम थीं ।