Smartscreen (Projector) in now a days educational system !!!
Projectors:
Traditionally , teachers teach lessons using blackboards . They teach using a white chalk piece to write on the board . If they need to erase , they will erase it using a duster . This system have some defects. The blackboard will turn white day by day after using it. If they get more white chalkpiece colour , the colour difference between the colour of letter and board might get difficult. It will lead to eye stress .
Using chalk piece ,the dust were created which is quite disturbs respiratory system. Washing black boards with water regularly will make it less in quality. By overcoming these difficulties , digital projectors were used in schools and colleges . Here teaching is done using a ball pen (stylus) . No dust particles were created . No need of erasing and the entire content could be on the board . But, in blackboards the contents is limitable. In some instances ,they prefer to take a powerpoint presentation.
The contents is already created and it requires only teaching. The only defect in this system is that the rays from the projector have minor effects on the health.
But ,in overall the system reduces the manpower and it is more efficient than traditional system. It gives professionalism and digitalism. Technology builds the country. Teacher's work is also a bit easier in this way. Thanks for reading the article completely .
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