Recitaiton room; Teaching room; Class-room; Lecture room
classroom; lecture room; recitation room; teaching room
Classroom;Teaching room;Recitation room;Lecture room
Lecture room; Classroom; Teaching room; Recitation room
Teaching room; Classroom; Recitation room; Lecture room
cathode-ray tube display(CRT display)
LED display system jumbo display system
One class elementary school; One room school; One teacher school; Single room school
one class school; one room school; one teacher school; single room school
One room school; One class elementary school; One teacher school; Single room school
One teacher school; One class elementary school; One room school; Single room school
Single room school; One class elementary school; One room school; One teacher school
2-dimension view display