I would agree about culling the rooster. My mother was attacked by a backyard rooster when she was five and was dripping with blood before she could climb high enough up a fence to get away from it. It was terrifying for her. She has been afraid of chickens ever since. A rooster with children is a foreseeable liability that could lead to wiping out your whole program if a child is harmed.
I would also read up on your local laws and ordinances that determine whether you can legally keep chickens at the school, in that part of town, etc., and whether and under what conditions you can sell the eggs. Many locations have handling, cleaning, and refrigeration requirements that you need to know about before you inadvertently violate a law or regulation and incur some kind of penalty. It stinks that there are so many considerations that go into such a great project, but it is wise to go into it knowing what is required.
I would also encourage you to make contact with other chicken keepers in your area to familiarize yourself with the local predators of chickens and learn what measures must be taken to protect your flock from harm. Chain link has large enough openings to admit many chicken predators and you may find that you need to dedicate resources toward effective protection of your chickens. Predation is an issue for most of us who keep poultry or waterfowl.
My younger son is in full-time SpEd. I love what you are doing and hope it is a great success! Make lots of use of this site to help ensure that things go well.
How many chickens do you have??
