Per the recommendations on the ONS website, I took the 3 (recommended, not required) prerequisite courses. Cancer Basics, Cancer Biology, Chemo Basics. I paid for the membership and the three classes out of pocket, but really think it helped me prepare for the ONS Chemotherapy and Biotherapy Course and exam. It helped me get used to the self-paced aspect of online courses, and familiarize myself with the online classroom platform. The exam is open-book, so while I was taking the class, I made sure to highlight and take notes in the 490-page book. It took me 2 hours to complete the exam, but I passed with 90%! Good luck!