The New Math Builder, age 4-12. Hardwood and steel abacuslike model of the base-ten number system, 27-min. introductory videotape, plus 6 books: Counting; Basic Addition and Subtraction, Major Addition and Subtraction; Multiplication; Division and Fractions; Using the Decimal

Autor:	Raber, Irene M.
Zdroj:	Teaching Children Mathematics, 1998 Mar 01. 4(7), 428-430.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41197019 Zobrazit plný text záznamu