本文分析了小学科学实验教学过程中,教师对材料准备工作认识存在的误区,分析了如何加强对实验材料的选择和控制,以在精心准备的基础上有序呈现,提高小学科学教学的有效性。 This article analyzes the misunderstanding of teachers’ cognition of material preparation in the process of science experiment teaching in elementary schools and analyzes how to strengthen the selection and control of experimental materials so as to present them orderly on the basis of meticulous preparation and improve the effectiveness of science teaching in primary schools .