The Tech Dept pushes out updates for your device. Please restart your device at least once a week to install those.
Avoid crushing the screen or closing the Chromebook with objects inside it.
Don't drop the Chromebook. When moving it close the lid and use two hands or have it stowed safely in your backpack.
Don't touch anyone else's device.
Keys do not come off easily. Leave them on the keyboard.
Don't remove the hinge cover.
Tech Support for Chromebooks