An additional helpful device is the document camera which can project large images of flat and three-dimensional objects for all students to see. This avoids the tedium of passing items around the room, or using lecture time to draw pictures on a chalkboard. The projection screen and the projector lift are lowered fully. The pot lights adjust to an appropriate level, then the fluorescent light banks turn off. The video projector turns on.
Some electronic classrooms have slightly different automated sequences.
The standby feature can be invoked manually from the touch screen or automatically, after a preset amount of time. If playing, the VCR stops, the tape is ejected, power is turned off. The room's fluorescent lights turn on, then the incandescent lights turn off. The projection screen is raised fully. The projector lift raises.