本文乃針對日本國小第六學年「理科」中，和「水溶液的性質」相關單元之教材，作一深入之探討，由教材內容中，我們得知其特點為：教材生活化，且能使學生走出戶外與大自然接觸的活動來設計，目標為培養孩童瞭解大自然，認識自然進而保護自然的觀念，促使提昇孩童蒐集資料的能力。此值得國內從事國小「自然科學」相關研究之學者、專家及教師們參考；最後我們提出三點建議，以供相關單位參考，即(一)教材多元化及因材施教、(二)教材生活化且突破學科界限、(三)教師指引內容應充實。

　　　　　This is an intensive exploration on the teaching materials of the unit concerning "Characteristics of Water Solutions" in the "Natural Science" course for students in Grade 6 at elementary school in Japan. The teaching materials are well noticed for the following features: ideally designed in such a manner that the teaching activities put pupils into direct contact with the nature; and are especially aiming at the following goals. The goals cover: cultivating recognition of the nature among the pupils; building up the knowledge of the nature and furthermore the concept of natural environment protection; and reinforcing the pupils' ability in information and data collection. Therefore, it is advisable to offer such teaching materials as reference to the researchers, experts and school teachers who are concentrating on "Natural Science" teaching in elementary schools in Taiwan. At a result, with this exploration, three proposals are given as follows: (1) Teaching materials should be diversified, and teaching methods should be pupil-oriented. (2) Teaching materials should be realistic and day-to-day living based, and not be confined within any subjects. (3) Teacher's manual should be enriched with sufficient information and references for the concerned parties to consult.