I usually take a pic if it needs attention and text photo to parent. Last week I had a girl fall into the wall and split open the skin by her eye. I sent photo and left it up to parents to decide if they wanted to pick up. They didn't. If it was my own child we wouldn't have gone to the doc over it either. They had an appt for her that night anyways. She ended up with a butterfly stitch on it.
If it's just a bump or scrape I usually just send a text and let mom know what happened.