Several latest year, it appears a virus named Covid-19 over the world. It very dangerous for human's heath, especially for students'l earning offline. It's neccessary for ...
Several latest year, it appears a virus named Covid-19 over the world. It very dangerous for human's heath, especially for students'l earning offline. It's neccessary for learning online. we use lots of tools such as videos, PDFs, podcasts, games to make our lesson interesting but it's difficult for the poor who has no smart devices.