Thanks for letting me pick the new topic! We were in the middle of moving so I didn't post for the last couple of assignments, so I'm excited to get back into it.
Here are a few links to articles about how to photograph silhouettes. These are the first ones I came across, but of course there are so many articles available online and you might find some better ones. I hope you enjoy this topic. I look forward to seeing your pics. :)
Digital Photography School article