The projector was not used in the classroom to study 20 years ago. This device makes the lessons more interesting, especially in the natural sciences including Physics, Geography, Chemistry, etc., scientific phenomena illustrated by video, images and sound. Students are often amazed at what is happening on the screen, and they understand the lessons well. This widescreen helps children focus more on the lesson and does not feel as boring as traditional teaching methods. Before this equipment is used, teachers have difficulty in explaining and communicating natural events to students. They have to use pictures or draw on the board with chalk, time-consuming but not effective. In my opinion, using a projector is a big change, saving time in teaching and keeping children involved. It also provides additional information in an effective and detailed manner. In addition, this change will continue thanks to the development of technology and the Internet.