Developing expertise, whether from cook to chef or from student to scientist, occurs over time and requires encouragement, guidance, and support. One key goal of an elementary science program should be to move students toward expertise in their ability to design investigative questions. The ability to design a testable question is difficult for novice science students and requires teachers to support students by using concrete strategies. This article promotes a tangible strategy teachers can use to help students design testable questions for experiments and discusses how the strategy can be used to help students design their own investigative questions.