核心素养视角下的小学数学单元整体结构化教学实践策略研究

为改变以课时为单位的碎片化教学现象,提出结构化教学,更好地把握数学知识整体结构,重组学生学习认知结构,形成立体关联结构,深入理解数学本质,促进学生深度学习。2022版《数学课程标准》颁布后,课程内容的结构化引领新一轮改革,核心素养视角下的小学数学单元整体结构化教学注重单元整体设计,帮助师生了解数学知识的产生与来源、结构与关联、价值与意义,建立起有意义的知识结构,推进核心素养落地。

核心概念统领下的小学数学单元整体教学改进策略研究

改变以课时为单位的“碎片化教学”现状,实现“为素养而教”的教学变革,以小学数学核心素养、核心概念、单元整体教学理念为理论支撑,开展“核心概念统领下的小学数学单元整体教学策略”研究,探索指向核心素养培育的小学数学单元整体教学策略,推进小学数学教学改革走向深入。

以问题为引领的数学大单元教学研究与实践——以“周长”单元教学设计为例

培养核心素养要求教师在教学中为学生树立大的观念,为此,可以将整个学段以知识点为单元进行内在本质的联系,从单元的知识本质出发将每节课联系起来建立知识结构。在核心素养背景下,本文进行了以问题为引领的大单元数学教学模式的探究,对学习内容进行分析、整合、重组和开发,建构以问题为引领的大单元教学模式,并以“周长”单元教学为例进行了相关探索和实践。

Study on the effects of carbon coating on lithium-storage kinetics for soft carbon

Carbon-coating is a simple and practical method to improve the electrochemical performance of soft carbon anode for fast-charging lithium-ion battery,e.g.,reducing the loss of active lithium during the formation of the solid electrolyte interface(SEI)film,and thereby improving the initial coulombic efficiency.However,the systematic study of relationships between carbon-coating layer properties and electrochemical performances is still lacking.Therefore,two soft carbon materials with different carbon-coating layers were used as model materials,which were prepared by vapor-phase method and solid-phase method,respectively.SEM,TEM,XRD and Raman were conducted to characterize the structural evolution of the soft carbon in the coating process.CV,GCPL,EIS and GITT were conducted to analyze the electrochemical performance of carbon-coating soft carbon.This work provides a good guidance for the development of fast-charging soft carbon material.