Dear (recipient's name),
Thank you very much for interviewing me for the position of Advanced Biology Teacher on March 9th. I am glad to hear that the position is still available.
I would ask that you keep me in mind when considering candidates for this position. As you may remember from our discussion, I have taught advanced biology at the high school level for over eight years. I am also an active member of the High-School Biology Teachers group and am considered an up and coming leader in the field.
Thank you again for your consideration. If you need any additional information, or would like to talk again, please don't hesitate to contact me at __________.
Sincerely,
(your name)