Pedagogical apparatus perfected for the simultaneous teaching of reading and writing. (Machine-translation by Google Translate, not legally binding)

摘要

Pedagogical devices perfected for the simultaneous teaching of reading and writing, characterized by the fact that two classroom devices have been arranged, each consisting of a rigid base or board that has hinged plates or folding planes on each side, which form an extendable and closable set at will. (Machine-translation by Google Translate, not legally binding)