Process Presentations

For this presentation, I'd like you to explain a process--either how something works, or how something is made. Please post your team's topic as a comment so I can approve the topic and avoid repetition. Very simple topics (like how to cook something) are to be avoided.

It could be a process that you're already familiar with, or it can be something that you learn about. Pick something that you're both interested in. Make sure you tell us the source of your information to avoid plagiarism.