Teachers can prepare lessons and attend classes on the platform without downloading. No matter where you go, you can open the platform for class at any time as long as you log in to your account, and you no longer need to carry a copy of the U disk with you. The courseware resources of national education resources cloud platform are jointly compiled and created by more than 200 front-line backbone teachers and more than 20 senior teachers of national education, and the resources are beautifully used. Some excellent resources can be found and downloaded from Baidu Library, Douding Library, Sina Library and Daokebaba. I hope this is exactly what you want.