While mobile classrooms (also known as portable classrooms or modular classrooms) are great when it comes to their low costs and quick set-up times, they're not the most secure option for school buildings. Their isolated and impermanent appearance can make them the ideal target for vandals, thieves, and intruders. Whether you're housing expensive equipment (like computers) inside, or you just want to keep your students safe from attackers, you'll need to take your own measures to increase the safety of these structures.
If you own an office building, even if you live in a safe area, you should have a commercial security system. Yet, even the safest areas are not free of theft. However, using locks and keys in the normal sense can be dangerous. It is not difficult to make a copy of a key and have no one be the wiser. However, with smart locks now available, you can be assured that your building will be safe.