I am brand new to keeping chickens but have done a lot of reading. I have yet to find anything that weighs pros and cons of different coop designs such as tractor or fixed, large pens with nesting house, custom coops, etc. These forums seem to be used primarily as a means of showing off different projects rather than educating about design choices. Also, what are the key design requirements other than the obvious like protecting from elements and predators? Here is a little background on what I'm hoping to accomplish: I am starting up an effort to keep chickens at my children's independent school as a learning exercise for the ethical care of animals, understanding where our food comes from, being good stewards of the environment, etc. We are aiming to start with 5 pullets this summer and would like to expand to 10 or more next summer.