The method is as follows:

Open the browser, enter the website www.sogou.com, enter: filetype:PPT math courseware in the search box, search for documents and click PPT, and use the download function of sogou to download the teaching design and teaching plan you need.

Please note the following two points:

First, just use sogou search filetype:PPT, you won't find what you want, so be sure to add keywords.

Second, there should be keywords between keywords and file types.