An Experimental Study of Methods of Instruction in Computational Arithmetic

Autor:	Guiler, W. S., Edwards, Vernon
Zdroj:	The Elementary School Journal, 1943 Feb 01. 43(6), 353-360.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/997775 Zobrazit plný text záznamu