All those ideas sound great. Especially if your town doesn't have a lot of vagrants (our town has had a problem with this, and you DON'T want to know!) I hope, however, you have permission from your town, and someone has looked at the right of way and easement documents, and if you want to have a market or something, what the town would require in the way of permits, etc.

Probably the easiest to find milkweed seeds are common (A. syriaca), swamp (A. incarnata), butterflyweed (A. tuberosa), and tropical (A. curassavica). The tropical is not native or hardy up north and grown as an annual, but it is readily available and easy to grow. I'm sure if you posted on the seed exchange that you were looking for a large amount of milkweed seed you would get several offers for postage only or maybe even free since it is for a school project. Gardeners are pretty generous I have found especially if you are teaching kids to get involved with nature. Be sure to educate the kids and any plant recipients about the nature of milkweed and that the "milk" inside is an irritant that can cause eye damage if not handled properly. Some varieties like the common milkweed can exude lots of milk when cut while others like butterfly weed are much less drippy. The common is an excellent food source as it gets tall with quite large leaves and spreads a lot, but it may not be wanted in small gardens due to the aggressive nature. It is better for wilder areas. Swamp milkweed is smaller and less aggressive and likes moister soil obviously. Butterfly weed is even smaller and bushier and tolerates dry soil and has a large taproot to seek out moisture. I have had cats on all these kinds although the butterfly weed is less used when other juicier types are available. The butterfly weed is popular when first planted when the leaves are young and tender. In the pic below you can see I had my very first cats on tiny freshly planted seedlings of butterfly weed that I was shocked they even found. I agree with KC that you could try other butterfly host and nectar plants as well for some variety. Hosts for black swallowtails are readily available too. That butterfly life cycle book is excellent. While it doesn't cover all the butterflies it covers most of the common ones with great pictures that are very kid friendly. Most of the plants are easy to start using the wintersowing method. And easy option would be to sow seeds in extra large plastic drink cups, quart size yogurt tubs, or similar containers. The open tops make them easy to sow in, transport, gift, and plant out from. Below is a link the wintersowing FAQ if you aren't familiar with it. Here is a link that might be useful: Wintersowing FAQ

There is nothing wrong with your idea. There will though as with any project be things that come up that will need attention such as I see a possible headache for you if a tenant decides to take back a plot that another is using our community garden does 10 x 10 foot plots and you may consider doing the same. Also you will need a couple compost bins and our garden and my home one is made of simple pallets. Will you provide a shed for tools? Will you have a hose for dry spells? Look for rules for a community garden and consider having a contract for use of your plots as neglected plots can become an eye sore that you will end up having to care for yourself. I am not trying to discourage you as it would be wonderful for you to allow gardening and it would only improve your land. You will also want to consider if you want to allow perennials as some are quite aggressive and will take over, run out of control and even can kill other plants. Mint is one that I would not plant again myself. If your not sure you may require special permission or avoid them all together.

Thank you very much for your helpful responses. My paper was a success and I received an A. I apologize for my errors. I am a very busy student and, neglectfully, I did not review my request. However, Ironbelly darling, if you have nothing better to do with your time than read old posts and make unhelpful remarks, then maybe you should find a new hobby. Gardening, it seems, is not cathartic enough to alleve your immeasureable chutzpah.