Abstract
The purpose of a series of my study is to show the concept of Symbol Sense and propose the methed of instruction to nurture Symbol Sense. In this paper, I investigate both interesting behaviours and the achievement situation of 9th grade students when working on algebraic investigation problems. These investigation problems are based on the framework by which we can grasp Symbol Sense (Hayashi, 2002a). I was able to observe many interesting behaviors as manifestation of Symbol Sense, and check the validity of this framework from this investigation. As a result of this investigation it was found that many students didn't fully nurture Symbol Sense, conversely were dependent on an algorithm, a formal procedure and algebraic processing.
