1. First, select the appropriate "textbook" and "grade" in the "Setting Center";

2. The "textbook" xiaobian chose the "general edition";

3. "Grade" Xiaobian chose "Grade 7";

4. After choosing the teaching materials and grades that suit us, we came to the page of video teaching, and Xiaobian chose the video explanation of "plane graphics and three-dimensional graphics";

5. Click "Enter" on the right side of the page to watch the teaching video online, and the left side of the page is "Download";

6. Click the "Download" button to cache the video offline, and you can watch the teaching video anytime and anywhere when there is no wifi.