Who was the person who thought about the idea of schooling in class rooms?

The concept of formal schooling in classrooms can be traced back to ancient civilizations, but one significant figure in its development was Horace Mann in the 19th century. He advocated for public education and the establishment of standardized schooling systems in the United States. Mann's ideas emphasized the importance of structured education, trained teachers, and age-appropriate classrooms, laying the groundwork for modern public schooling.