This set of 250 double-sided cards is intended to accompany Johnsons BRS Microbiology and Immunology, Fourth Edition. The cards consist of a straightforward series of questions and answers intended to help students enrolled in basic science courses and studying for USMLE Step One. Utilizing a short phrase that triggers the recall of an answer, each card asks students to commit a key point to memory before moving on to the next card. In addition, they offer a unique advantage to the student by emphasizing the important details, rather than giving equal weight to all information about an organism.