Autor:	Bray, Wendy S., Johnson, Jillian D., Rivera, Nancy, Fink, Lee-Ann, Bauduin, Charity, Schoen, Robert C.
Zdroj:	Teaching Children Mathematics, 2019 Apr 01. 25(6), 370-377.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/10.5951/teacchilmath.25.6.0370 Zobrazit plný text záznamu