hey yearbook staff member and photographer here! how it works for our school is if ur a student photographer u take photos, edit them, and submit them to us. we would pick whichever photos to use AND give photo credit to them. we credit everyone to photo by’s, photo courtesy’s, graphic by’s, and page by’s. there is no way for them to be considered copyrighted useless u go out of the way to copyright them urself as far as i know. if u no longer feel comfortable letting them use ur photos u need to tell them asap. something like “i no longer feel comfortable letting u use my photos” or “i don’t feel comfortable letting u use my photos without the proper credit by photo”. i also don’t know how ur yb is like, do they usually not give photo credit? is there a reason for u to think u won’t get the credit u deserve? if it’s bc she’s new or rude, maybe just make sure u get credited by talking to whoever is in charge of the yearbook or it’s staff. feel free to pm me if u have questions!