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	2021, Vol. 42(17): 24-31 DOI: 10.13884/j.1003-3807hxjy.2021040076

	Research on Progressive Dimensions of Understanding the Core Ideas of “Matter” of Students from Grade 1 to 9 from the Perspective of International Science Education
	LI Xiao-Feng^1,2*, ZHENG Chang-Long³
	1. Faculty of Education, Northeast Normal University, Changchun 130024, China; 2. The Second Department of Preschool Education, Chongqing Preschool Education College, Wanzhou 404047,China; 3. Institute of Chemical Education, Northeast Normal University, Changchun 130024, China
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