The Trial Manufacture Of The Effective Teaching Aids For Stereochemical Education By The Connection Of Constructing Molecular Models By Hands And Molecular Modeling Software

在1998~2001年的3个小时的基础化学实验中，对化学一年级学生用数码相机拍摄的分子模型图片进行了两次投影，讲授了如何识别不同的原子以及分子结构在键长和键角上的差异。并将计算机显示器上的旋转、平移和缩放的分子模型图像投影到大屏幕(100英寸大小)上。在绘制分子结构模型时，使用了彩色原子模板(纸做的标尺)。将一个类中的40个成员分成两个20个成员组，减小了分子模型的构建速度和绘制速度的离散性。生物分子结构的投影不影响三年级学生生物化学课的立体化学教学。在五年级学生实验班，构建生物分子手的模型并绘制在计算机显示器上。两种不同类型的分子模型的结合使学生对立体化学有较好的理解。我相信在4年的项目中已经建立了一个良好的立体化学教学体系。

The molecular model pictures taken by means of a digital camera were projected two times for the first grade students of the chemical course in the 3 hours' fundamental chemical experiments in the period between 1998 to 2001.In those projection, how to recognize the different atoms and the molecular structure differences in the bond length and the bond angle were lectured. And the molecular model pictures rotating, translating and scaling on the computar monitor were projected in abig screen (100 inches size). In orecler to draw the structure of molecular models, a colred atom template (a scale made by paper) was used. The dividing the 40 members in a class into the two 20 members' groups decreased the dispersion in the constructing rate and the drawing rate of the molecular models. The number 20 in a class would be the better than 40.The projection of the structures of the biomolecufe did not affect on the Stereochemical education in the biological chemistry class of the third grade students.In the experimental class of the fifth grade students, constructing the models of the biomolecules ty hands and drawing those on the computar monitor were carried out.The combination of the two different types of molecular models resulted in the good Stereochemical understanding of the students.I believe that agood educational system for the stereochemistry has been established in the 4 years' project.