Final answer:
When planning your expedition, the first thing you should do is determine the learning objective for the expedition. This will guide your planning process and help you choose the most suitable expedition.
Step-by-step explanation:
When planning your expedition, the first thing you should do is determine the learning objective for the expedition. This will help you choose the most suitable expedition and guide your planning process. For example, if the objective is to learn about different ecosystems, you might choose a field trip to a national park. Once you have determined the learning objective, you can then proceed to select the expedition, have students try the expedition, and get permission slips from parents.