This section is designed to enhance the activity leader’s understanding of the science activity the children will explore. It includes a brief overview, key concepts, what to expect children to do, or what they may find challenging in the lesson, and a description of common misconceptions they may have about the concepts. The laminated Activity Leader’s Guide is a road map. It includes a materials list and instructions to prepare the demonstration component of the expedition (lesson), as well as how to set up the APEX Science Center. It also provides guided instructions to introduce and implement each section of the children’s Expedition Learning Card: Wonder, Explore, Record, Expand and Conclude.