一、演示实验是有效的直观教学手段,可帮助完成教学任务通过演示实验,可以激发学生的学习兴趣,活跃课堂气氛。“兴趣是最好的老师”,生动有趣的演示实验可使学生的认识活动处于最佳状态,形成探求知识的巨大动力。例如在检验二价铁离子时,我没有按课本上的既定程序直接去做,而是 First, the demonstration experiment is an effective and intuitive teaching method that can help complete the teaching tasks through demonstration experiments, which can stimulate students’ interest in learning and activate classroom atmosphere. “Interest is the best teacher”, vivid and interesting demonstration experiments can make students’ understanding activities in the best condition and form a huge driving force for exploring knowledge. For example, when testing divalent iron ions, I did not do it directly according to the established procedures in the textbooks. Instead,