It is impossible to fit every piece of valuable information you would like to communicate to your students into a one shot instruction session. The Understanding by Design Egg Model can help you to prioritize what to cover in class, and what could be explained in a research or course guide.
Consider these questions when planning your instruction.
Adapted from Megan Oakleaf, "Lessons for the Librarian: 10 Tips for Teaching the One-Shot Instruction Session"
Consider the following assignment prompt:
For your final paper you will take a position, informed by scholarly sources, on one of the controversies on the approved topics list. Your argument must be supported by a minimum of 6-8 scholarly sources.
Planning an instructional session based around this assignment, using the UBD egg model, could look something like this:
The main focus of the session would be defining, identifying, and evaluating scholarly sources, with some time spent on search strategies. While the guide would contain additional recommended resources, databases, and search tips, these would not be covered in depth during the class itself.