One way to help elementary students see connections more easily and to make their thinking more visible is to teach them to approach scientific investigation and problem solving as scientists do—from the framework of “finding evidence to support claims.” In this article, the authors begin by introducing students to the concept of evidence, then build on that idea by introducing the concepts of cause and effect and the need for accuracy in evidence (i.e., measurement), and finally by introducing the ideas of variables and control in an investigation.