Advice on Including Shadowing Experience

I am currently applying to nursing school officially after finish up my pre-reqs and th people I asked to give me letter of recommendations said they want to know everything I’ve done and not too long ago I shadowed a nurse in a hospital..how would I include that on a resume and where exactly would I put that? I don’t want to leave that experience out because it definitely was an interesting experience and it also gave me a glimpse of what being a nurse is like

You could send your resume and put in the email separately that you also had the opportunity to shadow a nurse and explain how your experience was, what kind of unit it was, and what you learned. If you want to put it in your resume that you send to people writing your recommendations, you could put it under "work experiences" or make a section titled "relevant experiences"