• The Background Information for Activity Leaders reviews the key science concepts, and also provides you with an idea of what to expect the children to do.
• The detailed instructions included in the laminated Activity Leader's Guide will help you determine what materials to gather and how to set up the APEX Science Center, along with a guided script that walks you through the expedition.
• Your children will use the graphic-rich laminated Expedition Learning Cards to explore hands-on the science concepts.
• The Data Collection Sheet templates and any other supplementary materials for the expedition will help facilitate the delivery of the lessons.

The order in which you implement the units and expeditions depends on your afterschool program's needs and time constraints. You may, for example, choose to implement one unit per month, which is equivalent to one expedition per week, or you may find that the children want to explore an expedition or a unit over a longer period of time. We have ordered the four expeditions for each unit in a way that allows the activity leader and the children to build on what they learn about the unit's theme.