In construction mode, enter: ctrl+shift+C and then enter: bb.moveobjects in the white box on the upper left (items can be placed overlappingly). After opening the cheats, use "9" and "0" to raise or lower objects.
This high school classroom cc sims 4 includes 14 items: 1. Wall light | 2. Blackboard | 3. Geography maps | 4. Bookcase (one tile, two tiles and empty versions) | 5. Cube shelves | 6. Large window (one tile or 2 tiles)