Poison Ivy can have a variety of lobe and tooth patterns on its leaves. However, it never has fine regular teeth. The photos are close-ups of various leaves (not necessarily poison ivy leaves) with captions that suggest whether or not that leaf pattern could be poison ivy. Click on a photo to see a larger photo.

"could be.." means that that particular leaf could be poison ivy.
"not poison ivy" means that poison ivy pretty much never appears with that kind of serration to the edge.

could be could be could be not poison ivy could be

 

could be not poison ivy not poison ivy could be not poison ivy