What grade you are in, or how long the teacher has been teaching, or whether or not you'll be making a profit off of it, has nothing to do with whether or not using someone else's with without citing the references is plagiarism. It is. Period.
Personally, I'd go talk to the professor and/or someone above him (department head maybe?) and tell them that you are offended that you are being instructed to plagiarize, and concerned that the students are being taught that it is ok to do so.
Freshman composition II and she's in her 60s, so several decades.
1.0 Western Slender Glass Lizard; Logos
0.1 Charcoal Cornsnake; Morana
1.0 Golden Gecko; Smoothie
1.1 African Plated Lizard; Cypher and Nara