基于微课的化学综合设计实验教学模式探索——以天然色素的提取、提纯及表征实验教学为例

A Microlecture-Based Exploration of the Teaching Mode of Chemistry Comprehensive Experiments——A Case Study of Extraction,Purification and Characterization of Natural Pigment

以天然色素的提取、提纯及表征实验教学为例,探讨微课理念下的大学化学综合设计实验的教学模式及其评价方法.具体做法是:首先教师将实验的具体要求、实验所用到的仪器操作方法、原理、规范及实验关键点录制成一个个不超过10分钟的微课,并发布在微信上;学生根据教师的要求设计实验内容,与教师讨论并优化实验方案;最后按优化的实验方案实验.这翻转了以往的实验教学模式,使得学生在课堂外就能很容易完成实验设计和基本的技能知识储备;而实验室变成了师生之间和学生与学生之间互动交流并最终完成实验的场所.这种模式与传统的综合设计实验教学相比,有四大优点:一是通过微课微信师生交流互动方便快捷;二是有利于培养学生的创新能力;三是实验质量更有保障;四是方便管理.总的来说,微课理念下的化学综合设计实验教学模式更有利于培养学生的创新能力和提高实验教学质量.

In this paper, the microlecture teaching method for comprehensive design experiments has been discussed. With the example of“extraction, purification and characterization natural pigment”, we first uploaded some 10-minutes short videos of this experiment via Wechat. Then students downloaded the videos,learned the principle and content of this experiment, and discussed the experiment scheme with teachers and other students outside the classroom via WeChat. At last, the students did the experiment in the lab by theirmodified scheme, and handed in the reports via internet. This teaching method flips the traditional teaching model, which is beneficial for quick communication between students and teachers, training the students’innovation ability, and enhancing the education quality.