id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
6t053f4807b	Lori Anne Petersen	The Effect of Concrete Objects on Counting Skill: An Interaction Between Perceptual Features and Established Knowledge	2010		.txt	text/plain	141	7	46	Concrete objects are used to help children understand mathematical concepts. Research suggests that perceptually rich objects may hinder children's performance on mathematics tasks relative to bland objects.	cache/6t053f4807b.txt	txt/6t053f4807b.txt