When the teachers are difficult to express the esoteric concepts and principles by language in teaching, they can use new aids to explain them intuitively to the students. The unique sound, image and movement of teaching aids can enhance students' ability to understand, develop students' learning interest, and stimulate students' innovative consciousness and innovative spirit, especially can better play its unique role in practice activities of vocational education and improve the quality of teaching.%老师难用语言对教学中深奥难懂的概念及原理进行表达，可利用新教具形象直观地给学生讲解，教具特有的声音、图像、动作能增强学生的理解能力，能培养学生的学习兴趣，激发学生创新意识和创新精神，特别在职业教育教学实践活动中更能发挥其独有作用，有助于教学质量的提高。
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