Core Bio provides self-tests for biology, with a focus on genetics, in the 9th grade, and 12th grade, and for university Intro to biology classes. Self-tests include subjects to the rules of inheritance of amino acids and macromolecules. The 12th-grade high school level has questions crafted from the GCSE exam for biology. Visual self-tests help users memorize using a flash card mode with self-tests to enter the names of organelles or stages of biological processes.