"Teaching Science" has, as one of its predecessors, the "Investigating" journal, which first appeared in 1988. Looking back ten years, the winner of the "Most Valuable Paper Award" for 1999 was Kimberley Pressick-Kilborn for her article--"Steps to Fostering a Learning Community in the Primary Science Classroom". In this edition of "Teaching Science" we revisit Kimberley's article, describing a Year Three class that becomes part of a knowledge building community as they investigate ways to assess water quality. (Contains 3 figures.)