As the upcoming school year approaches, many science teachers may be looking for new ways to incorporate inquiry in their classrooms. Fortunately, teachers have an array of inquiry activities at their fingertips. But with so many resources available, it can be challenging for a teacher to make an educated decision about which experiments to incorporate into the lesson plans. To help teachers select the most appropriate inquiry activities—which vary widely in the structure provided for students to conduct experiments—this article provides a rubric that can be used to compare experiments and suggests trajectories for structuring inquiry across the curriculum.