This Cell Unit Study, from Highhill Homeschool was a big hit with the readers:
Another popular link was this guide on using papier mache to make a map from Angelicscalliwags.
This post on math and how to mess up a child's math mind, from Love 2 Learn 2 Day, was very thought provoking.
Kathy's Cluttered Mind provided us with a great unit study on birds.
For a great guide to the November elections check out Departing the Text.