You are a teacher, aren't you? I am a teacher, too. Everyone should communicate more. You said that the browser of distance education resources in rural primary and secondary schools could not be opened. In fact, if your school computer can access the Internet, I'll introduce you to a website.

Http://218.22.87.180/home page of modern distance education resources in rural primary and secondary schools.

Http://218.22.87.180/kczy/xia/yw/1/Ke Biao -bsd.htm course resources.

Go to the website above and have a look. Just like distance education, there is no leakage of resources. It is run by the state. Download it there!