Designing spaces can be an interesting activity in several subjects, starting at the conceptual stage with digital prototyping, and including trial of solutions, without a great deal of effort. We could use a floor planner to design:
A new school laboratory
A photography studio
"The school we want"
A yard
An eco-friendly house
An activity for language teaching, where students would have to name objects in different places
A set for a drama performance
A setting in which characters of a book move around in, for creative writing
In the "good old days", when computers were rare, I built a music studio with an old friend of mine. At that time we had neither the money nor the fancy digital floor planners, so we just used the usual techniques of buying cheap stuff, and trial and error, moving instruments and equipments repeatedly until we found the perfect configuration. We got egg boxes from a friend who had a cakes factory, some old carpets from a neighbor...