To do that, the team built what Ellis calls «the largest metal 3 - D printer in the world» — about the size of a classroom. (inc.com)
The sound of teacher and student speech is also recorded, and its quality depends on the size of the classroom, the number of students, and the microphone quality. (elearningindustry.com)
This ensures teachers and students can view details regardless of the light levels or the size of the classroom. (qaeducation.co.uk)