Some links for reference:
Digital Photography School
Frame Your Picture
An example (I actually had a few to choose from!)
A review of the rules might be helpful:
1. The image you submit should be taken between the June 11 (when it was announced) and June 25 (up until one of the moderators closes the the mini-contest).
2. EXIF data needs to be intact. It helps if you can include the main points (including camera, lens, date taken, ISO, shutter speed and aperture) in the text of your message.
3. Your post must include "Assignment: Natural Framing" to show your permission to count it for the contest.
4. Only one entry per member (if you can't restrain yourself until the end of the first week you can post two or three separate pictures but your entry should be in a separate post and the only marked with the text above).
For everyone, please do not repeat other people's photos by quoting them until the contest is over. If you want to comment on or discuss an entry you can use a link to it (or just delete the picture from the quoted text).
Next week's assignment? A few months back we did an assignment for Hands so this time we'll go for a slightly more challenging subject. Feet.