How to become an elementary school teacher (prefferably NY only)?
I am a student at Stony Brook University and majoring in Biology, but minoring in Child and Family studies.
Now, I want to go into elementary school education but there is no major for it at my school, and plus, I want to finish my biology degree.
What will I have to do when I graduate undergrad to become a NY state licensed elementary school teacher?

http://usny.nysed.gov/licensing/teachercertlic.html
Every state has a site that walks you through what you need to become certified. I added the link for New York above.
If your school doesn’t have a teaching certification program, they might be able to tell you where to get information locally, or be able to refer you to a teaching program at another institution.
I loved getting certified for elementary. Good luck with it.