Let me remind you of this in the syllabus:
Do not plagiarize or cheat in any way: if you do, you will fail the course immediately: do your own work and do not ever look at any other students’ work “as an example” of what to do.
To help avoid plagiarism, I also strongly suggest that you do not search the internet for anything related to any assignment unless I ask you to do so. Doing so might result in sentences and paragraphs from sources from the internet winding up in your writings. This will likely be plagiarism and thus will be penalized.
Thus, if you are looking for further explanation of something found in the texts, ask me and/or check with the resources that Rachels suggests in the book.