RIP Tiny, our Phoenix and HeadPuffjdu our Polish Crested
RIP Tiny, our Phoenix and HeadPuffjdu our Polish Crested
I'd be tempted to toss a chick or two in a box along with their waterer and take them to the outdoor area you mentioned. 11 year olds can be responsible to a fault. I'd just lay down some ground rules (no tight hugging, watch out for other birds, etc).
However, if you don't feel comfortable, just say no. That's fine too! 
I took my chicks to 2 of my kids' classrooms (2nd and 4th grade), plus a kindergarten class when they were about 2 weeks old. I kept them in their big plastic brooder/bin and let kids come over to me and hold them one or two at a time. I had no thoughts of bio-security then (and I don't think I would now either). My concerns were with the chicks possibly getting loose and getting stepped on. So I had all of the kids sit and promise that they wouldn't get up or chase a chick that got loose. One did get loose, they were pretty good about not freaking out, and I was able to scoop it back up. It was really a good experience and kids still come up to me a year later and ask if we still have our chickens. There are not too many families around here that have them, so it was something new for most.
I'd say do it. If you have portable fencing to make an area outside then do that. I would prefer to be inside, but that's just me. I guarantee there are no rules against bringing chickens to school. If the teacher says it's OK then it is. This is a perfect chance for you to share your love of chickens and how cool it is to raise your own hens with a whole group of eager kids, plus what sounds like a very eager and encouraging teacher! 
Thats an excellent question. I put together a kind of short report about how we built our incubator, what was involved in the incubating, and included pictures and a video of the chicks hatching. I was going to bring the chicks in to see the class but by 4 wks of age, they were too big already. I wasn't sure what to put them in as they were starting to flap around pretty good.
I forgot to mention, I gave the report to my son and my daughter for their respective classes, grades 2 and 3, the teachers said the class loved it!
We took 3 of our chicks and several other birds to a local primary (4-11 year olds) school for their fete. They were only handled by people in our group
with visitors stroking them. It worked really well, helps to educate people of all ages and gives them a chance to do something new.
Our birds are fine and there was no parasite transfer.
If need be perhaps put them in a wired cage so people can see them (but bigger birds cannot get them).
Hope it all works out
iFairy x
My little family consists of: over 40 hens (including ex-batts, bantams and a wide range of other breeds), 9 cockerels, 10 chicks, 12 ducks, 3 dogs, 2 kittens, 1 cat, 12 rabbits, 4 geese, 10 Jacob sheep, 1 Romney Sheep, 9 lambs, 4 cows, a brother, sister, father and mumzy :D
My little family consists of: over 40 hens (including ex-batts, bantams and a wide range of other breeds), 9 cockerels, 10 chicks, 12 ducks, 3 dogs, 2 kittens, 1 cat, 12 rabbits, 4 geese, 10 Jacob sheep, 1 Romney Sheep, 9 lambs, 4 cows, a brother, sister, father and mumzy :D