I don't know what state you are in, but I went to LVN school in Ca, in the bay area. I went to some great medical centers, such as, SFGH, Chinese Hospital, St. Lukes, VA...the list goes on..
What I learned depended on where I was placed and the goals you came up with along with your instructor. At St. Luke's I leaned to care for pt. in comas with tracheostomy. At Chinese I learned how to care for pt that do not speak English and still meet their care needs. At SFGH I leaned how to deal with a underserved population of pt. that had AIDS, cancer, hip fractures, strokes, mental illness and anything else you can think of. I lean how to insert a foley, dress different kinds of wounds, do pin care for ORIF, monitor chest tubes, glucose check and insulin coverage and how to pass meds.
You also learn a lot at school in your lab. But, what you learn I think is up to you.. If there is something that you have an interest in..let your instructor know, and when you are at clinical, remind them and jump in and do the skil you wihs to learn.