Are you looking for NEW cages or going to keep the glass cages?
The glass cages are easy and inexpensive to "spruce" up. First I'd suggest wrapping the back and sides with some type of background picture which adds not only an interesting visual, it also serves a purpose by covering the front and sides of the cage .
Behind the poster wrap, you should insulate the back, sides, to and bottom along with the screen top. It will help with heat retention and humidity plus offer the animals some sense of security (like the poster background) which they need badly if they are in a classroom with interested school kids.
Interior items that look "realistic" can be purchased at a pet store.
Personally I'd suggest new plastic caging for some of the animals and a safe warm corner area for the cages. Big, open classrooms are usually cold and are going to tax your heating source which in turn will tax your in cage humidity which could be problematic depending on the species. Classrooms are also high activity areas so the closer to a corner that is still good for view is preferable.
Much more expensive, but a better all around option is plastic caging. Obviously, good heat sources with thermostats are assumed. If not you need to get those items as well.
If the caging and animals are part of your classroom, you may be able to write the items off as essential equipment?? I have no idea if that is possible but if budget is a problem, look into it.
These cages have been set up and added to over time as the snakes grow and require larger items.
Hopefully seeing a few things in these pictures will give you some creative ideas. Just be mindful of proper husbandry before you make cosmetic upgrades.
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