Hi Yixi,
Thanks for sharing your ideas. In your post, your view is Powerpoint presentations and multimedia learning are very valuable. Multimedia learning can improve efficiency and learn easily.
I very much agree with your point of view. I think that multimedia has become an indispensable part of education. So how to make effective multimedia that attract students’ attention has become an important factor for teachers to explore. Multimedia learning principles are guidelines for improving the quality of multimedia produced by teachers.