What software do isolated students at home use to take online classes?

Designated according to the requirements of the school.

During the period of home isolation, primary and secondary school students everywhere could only attend classes online at home, so some online education apps came into being in the past two years, which not only met the needs of society, but also promoted their own development. What software students use for online classes needs to be determined according to the unified arrangement of the school. General schools will choose the software suitable for their own teaching according to their own conditions.