New courses indicate: ' to set out with students' experience of life, let them experience the course of making practical problems into mathematical models and explain and apply, then make them obtain the understanding of math and at same time obtain development in many aspetcs of ability of thinking, attitude of emotion and value'. Math learning shall set out with students' experience of life, but how to set out, how to add the experience of life into mathematical courses? Situational teaching which is connecting mathematical courses and actual life plays a role, but in new courses fast develeopment today, designing what types of situaional math problems can make boring and abstract mathematical knowledge close to students' actual life, meet their experience of life and cognition? It will be seen from this that designing situation and raising strategy researches of teaching validity are still worth us to explore.
Chinese key words: Situational teaching lifving figure teaching validity
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