Can anyone help me with an online job?

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Hello, I am a Chinese, and I teach in a school, so I have some time available. And now I wish to find an online job that really pays me. I do not wanna earn a lot of dollars, but I still wish I could earn about 300 dollars a month. So is there anyone could tell me some money earning programmes online, which should be valid in my country and without my quitting teaching now?