1 juill. 1914 - Visual Instruction movement grew; 5 national professional orgs began, 5 journals , and 20+ teacher training institutes on visual instruction
Description:
5 national professional orgs began, 5 journals , and 20+ teacher training institutes on visual instructionAjouté au bande de temps:
Date:
1 juill. 1914
Maintenaint
~ Il y a 109 ans
