noun
1. : an informal flexible system of elementary education in which open discussions and individualized activities replace the traditional subject-centered studies
2. : a classroom in an open classroom system
noun
1. : an informal flexible system of elementary education in which open discussions and individualized activities replace the traditional subject-centered studies
2. : a classroom in an open classroom system
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012