Interdisciplinary units use intriguing organizing themes such as "reality and illusion" to frame the scope and sequence of a curriculum and highlight meaningful connections between the disciplines. What do you think? Does the theme "reality and illusion" intrigue you? What questions might a mathematician ask about this theme? An historian? A philosopher? A poet or a writer? Try coming up with some questions that might be asked about "reality and illusion" from the perspectivesof the disciplines that interest you. This will help you get into the mindset of interdisciplinary curriculum design. Think about how to find connections between the disciplines that really work.