化学教学如何开展STS教育

化学是一门基础性、创造性和实用性的学科,对农业、工业、国防和医药等的发展有重大的贡献,跟现代人的衣食住行用有密切的关系,广泛地影响着现代人类的社会生活。化学工业是21世纪我国国民经济的支柱产业之一,也是上海市新的经济增长点之一。     

初中化学探究性学习活动实施的阶段性策略

结合教学实践,探讨在初中化学教学过程中采取符合学生认知的阶段性教学策略,引导学生在探究性学习中自我建构知识体系,切实转变学生的学习方式,优化学生的思维品质,促进学生的主动发展。     

混合溶剂中烷偶联剂KH570对纳米ZnO的接枝改性

The reaction of ZnO nanoparticles grafted with KH570 silane coupling agent was carried out in water-alcohol mixed solvent. Several characterization methods were applied to analyzing the results of surface modification such as Soxhlet extraction, Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), thermogravimetry (TG), differential scanning calorimetry (DSC) and zeta potential (ζ). The results of FT-IR and TG-DSC show that the desired reaction chains have been covalently bonded on the surface of ZnO nanoparticles. Zetasizer results reveal that themaximal absolute value of ζ of the modified ZnO particles in acetone medium was 67.0 mV, which was much higher than that of the unmodified ZnO particles. So the surface of nanosized ZnO changed from hydrophilicity to hydrophobicity and the dispersity of ZnO nanoparticles were improved simultaneously. Finally, the mechanism of graft modification was discussed.     

初中化学学困生教学辅导优化策略

优化学困生的化学教学辅导,必须遵循教育规律、尊重差异、重视学生探索新知的经历和获得新知的体验,肯定他们的努力和付出的劳动,让学困生在关爱和实践中体验成功,收获快乐。     

浅谈学困生化学教学辅导优化策略

优化学困生的化学教学辅导,必须遵循教育规律,尊重差异,重视学生探索新知的经历和获得新知的体验,肯定他们的努力和付出的劳动,让学困生在关爱和实践中,体验成功,收获快乐.