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蔼快乐的美国访学校司机大叔: 你别在这硬拗了,拗的时间越长越灰头土脸,自己进美国国务院的官方网站上去看看,,别跟我说你看不懂噢
These are some examples of activities that require different categories of visas and cannot be done while on a visitor visa:
Study
Employment
Paid performances, or any professional performance before a paying audience
Arrival as a crewmember on a ship or aircraft
Work as foreign press, in radio, film, print journalism, or other information media
Permanent residence in the United States