As long as you've got a high-perf endorsement yourself, then yes, you should be able to. As long as you aren't violating your student visa (which I don't think you are, especially if you're not getting paid, or "holding out"), the only other problem may be finding an airplane to use... most flight schools don't like instruction carried out in their aircraft by people not working for that company.
How do you intend on getting a work visa? I think you may have trouble with this aspect, and even if successful, it could take 3+ years. Hopefully you've already looked into the visa side of things, and are well versed on the US immigration system??! I hope so, as you may be in for a shock.
