Review CCRN Topics based on key high yield topics and referenced materials from standard academic sources.The app is Uniquely designed to help the user browse information or learn content. The Learning mode of the App is a based on the Spaced Repetition theory of learning. Spaced repetition is a learning technique where the user rates the degree of complexity of each concept and how well they think they know it. The program then remembers the ratings and displays the flashcards with material rated complex, more often and concepts that are rated easy are shown less often. The algorithm continues until the learner masters all the concepts.The program also allows from random revision of the flash cards.