This is a fantastic resource for designing a bio-dome, excellent for studying ecosystems, specific environments and engineering (there’s also a nice little bit of recycling of plastic bottles involved). The webpage also details how to approach a number of lessons teaching with regards to the bio-dome that students can build. There is also a Bio-dome workbook in pdf that can be downloaded from the page, a full list of materials needed, an introduction with extra vocab section and a simple to use instruction on how to build a simple model bio-dome.
The lesson plans given by Teach Engineering break down different things to look at/study within the bio-dome (energy flow, plants, animals and then decomposers), these could easily be adapted to fit what a teacher specifically wanted or to fit different timescales, you wouldn’t need to add plants, animals and decomposers over 3 weeks unless it helps to establish each one first. Maybe that’s what a school technician is for, hehe!
I think it would be fascinating for a class (or STEM group) to do this over perhaps a few weeks with maybe one built bio-dome for everyone, to see the effects of the bio-dome. The website recommends roughly 5 hours of “lesson” time, but however much of it could be done outside of a lesson to speed learning up.