The possible uses of the YC-400 camera system and the CASIO projectors are being tested in lessons at selected schools. During this, teachers in all subject areas are discovering the clear advantages of the system in comparison with overhead projectors and other existing presentation systems. An ammeter is projected on to the board to clarify the measurement of the strength of a current to the pupils. •  Complex procedures can be explained more effectively with the aid of a "concrete" object. •  As the pupils do not have to look at a textbook or photocopy, they direct their attention to the board and the teacher. •  YC-400 multi-function camera system and XJ-360 data projector