The Biology Department at the College of Education for Pure Sciences organized a training course on (Knowing the Normal Levels of CBC and How to Prevent Blood Diseases). It was delivered by: (Asst. Lect. Hajar Muhammad Kazem), (Asst. Lect. Zulfiqar Abbas Miteb), and (Asst. Lect. Nada Abdul Hussein Muhammad). The course aimed to educate attendees about the extent of hereditary and acquired blood diseases and the most important treatment methods for them. The course also included several topics on blood components and parts, and an explanation of the complete blood count (CBC) test. The researcher called for attention to such topics by conducting similar courses to know the natural rates of blood diseases and how to prevent them, so that they are more detailed.