The-DON

I worked with them in the ER, however it is a state by state thing. There is the option of obtaining an post grad acute care certificate as well.

You could work in the ER as an NP. I worked with many as a trauma nurse,

I remember being taught that regardless of your position you are held to your highest level of degree. Meaning you may be working as an RN but if you are an NP and something goes wrong, you are held to the NP scope.. (even though your employer has limited that scope). So it is best to avoid situations like this. Teaching is definitely a better option. With that said, I haven't ever confirmed this but I personally wouldn't want to take the risk either way.