1　问题提出教学手段通常是指为了达到教学目标而采用的各种媒体和工具 .在教育技术学中 ,教学手段又称为教学技术 .衡量一项技术是否最佳 ,在技术学中 ,有三个原理 :需要可行性原理、经济有效性原理、简单可靠性原理 .这三个原理也同样适用于教学手段 .学生是教学的主体 ,只有 1 Problem-based teaching methods usually refer to various media and tools used to achieve teaching objectives. In educational technology, teaching methods are also called teaching techniques. To measure whether a technology is the best, in technology, there are three Principle: The principle of feasibility, principle of economic effectiveness, and principle of simple reliability are required. These three principles also apply to teaching methods. Students are the main body of teaching.