PPT is usually used when making training courseware. I think it is best to have a clear structure, concise language and illustrations, and some video-assisted teaching. Avoid piling up words and avoiding large paragraphs of content. The main structure is introduced at the beginning, and there are several parts. At the end of each part, there should be a page summary of the part to summarize the main points. Pay attention to font size. Usually on the 28th-36th. According to the size of the venue and the number of students, make sure that the students in the last row can see it clearly.