overhead projectors
Classroom image casters
Overhead projectors are devices that project images from transparent sheets onto a wall or screen, once standard equipment in classrooms and conference rooms.
A light source beneath a glass surface shines through the transparency, and mirrors direct the enlarged image forward.
The teacher wrote on the overhead projector while lecturing.
Largely replaced by digital projectors and presentation software.
- classroomEducational instruction space
- teacher's deskEducator's classroom workstation
- rolling cartWheeled platform for moving items
- opticsScience of illumination
- transparencyState of being see-through
focusing · light bulbs · focal length · illumination · lens · bulbs · screen · image · presentation · visual aids · educational media · visual learning · teaching tools · educational technology · audio-visual aids · learning materials · visual communication · acetate
- obsolete techfloppy disk, VHS, dial-up modem, cassette tape, floppy disks
- presentation equipmentscreens, microphone stand, microphones, podium, lectern
- teaching mediaeducational films, instructional videos, teaching aids, learning aids, teaching tools
- schoolteachers, classrooms, classes, student, grades
- school suppliespencils, pens, erasers, pencil, notebooks
overhead projectorsdigital projectors
Electronic display-casting devices
smart boards · interactive whiteboards · PowerPoint · LED screens · LED displays
overhead, projector, project, heads, headed, heading, headless, header, overhang