|Small Greeting Card||Large Greeting Card||Postcard|
|4" x 6"||5" x 7.5"||4" x 6"|
A classroom is a room in which teaching or learning activities can take place. Classrooms are found in educational institutions of all kinds, including public and private schools, corporations, and religious and humanitarian organizations. The classroom attempts to provide a safe space where learning can take place uninterrupted by other distractions.