1) In the past, since most teachers relied solely on books and blackboards, many students found their demonstrations boring and hardly maintained their concentration during lessons.
2) Furthermore, some pictures, drawings or objects used for illustration were not big enough for all students to see clearly. As a result, many students had to crowd into a place to view them.
3) It is most likely that students twenty years ago were not able to enjoy projectors in their studies.
4) In addition, instead of having opportunities to watch movies directly in classrooms, they looked at pictures and heard stories told by their teachers.
5) Apparently, modern projectors connected to computers allow teachers to deliver lessons effectively through vivid presentations and get students more involved in the learning process.
6) These devices are widely utilized for displaying presentations in classrooms.
 Mình sắp xếp như thế này dúng không ạ??