如何申请2nd H1B?????????谢谢

如何申请2nd H1B?????????谢谢

在学校A工作（H1B已收到)，暑假想在另一个学校B做part time instructor，请问能申
请2nd H1B可以吗？谢谢。
In addition, 学校A will pay me one month salary in the summer. is that a
duplicated salary if I am working for School B at the same time in the
summer.
Thanks a lot.