Why did formal teacher-preparation programs develop as schools expanded to serve more children?

Formal teacher-preparation programs developed as schools expanded to meet the growing demand for universal literacy in industrializing societies. Initially, the supply of educated individuals willing to teach was severely limited, and public funds were scarce. To address this, early systems like the monitorial system used senior pupils to instruct others, providing a simple, cost-effective solution for basic literacy.12

As the needs of pupils and schools advanced beyond basic literacy, human knowledge became more diverse and organized into new disciplinary systems. This shift rendered early inclusive pedagogic methods insufficient and created a professional need to reconcile a teacher’s personal education with specialized classroom techniques. Consequently, institutions such as the normal school emerged to provide systematic training in pedagogy and subject matter. These programs helped establish professional standards, certification processes, and a body of specialized knowledge, ultimately transforming teaching from a form of domestic service into a recognized profession.21