Tui viết về máy chiếu (projector) nhé.

About two decades ago, people hardly knew about a projector that facilitated students' study. However, thanks to our advanced technology, more and more schools are equipped with projectors because of their benefits in education. Without this modern facility, students in the past could still study but in a more difficult way. Instead of presenting their ideas through a projector, students had to make a large poster including their opinions about a problem. Besides, there were no visual images and videos as learning sources in the classroom; therefore, teachers in the past also prepared lots of tasks that encouraged their students to perform livelily. Despite this lack, their learning results seemed quite good as there were still famous and successful students during that period of time.

In the past, people used to not use the internet like they do now. Once upon a time the Internet was an unnecessary medium. Instead of texting, playing games, they use writing letters or playing folk games will be much more interesting. They focus on learning without using or depending on anything from the internet, from the elderly to children. As for students, they see the internet as something that is both beneficial and harmful. Instead of learning dependent on the internet, they want to learn practically on their own and without its help. Therefore, most students previously did not have the need to use the internet.

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