学生去美国留学在哪里交的$100啊?

The SEVIS fee has been set at $100. Certain short-term exchange visitors will pay a reduced fee of $35. All applicants required to pay the SEVIS fee will also have to complete Form I-901. This form is available on-line at www.fmjfee.com

所以你可以到http://www.fmjfee.com在线交你的SEVIS fee，然后打印一份Sevis fee的收据，这份收据是签证的时候必须的。

如果你需要更多信息，你可以阅读大使馆或者领事馆的网页上面的学生签证指南。