If you have a tech department at a school in search of an economical Chromebook case for your Samsung Chromebook, then Passive Ninja recommends the Cranium Hard Shell Case. It’s a lot cheaper than replacing the screen, it’s light and thin, and it’s a white board.
Order it direct from the inventor / manufacturer for your Samsung Chromebook 2 or Chromebook 3. If you want pretty plastic, use the iPearl. If you want soft and heavy, get a briefcase. If you want continuous protection where it’s needed most, get the Cranium.