TK
Today, studying is more modern and easier. Some modern facilities are used for studying such as computers, projectors, etc. One of them is projector. The projectors are used for helping the students imagine and understand better. But in the past, the students didn't have projectors. So they imagined more difficult about the processes were described in the books. I think the change has a big meaning. It helps the students study better.
Prior to 20 years ago, projectors were not used in the classroom for study. This feature makes lessons more interesting, particularly in natural science subjects such as physics, geography, chemistry, and so on, because scientific events are illustrated with videos, pictures, and sounds. Students are usually astounded by how things appear on the screen and have a clear understanding of the lessons. This large screen allows children to focus more on the lessons and avoid boredom, which is a disadvantage of traditional teaching methods. Before using this device, teachers had a difficult time explaining and conveying natural events to students. They had to use pictures or draw on the board with chalk, which took time but was ineffective. Using a projector, in my opinion, is a great chance that saves time while teaching and keeps children engaged. It also provides more information in a more efficient and detailed manner. Furthermore, thanks to technological advancements and the Internet, this change will continue. P/s : b tham khảo nha