Crib sheets are concise reference documents that summarize key information on a specific topic. They are often used in educational settings, workplaces, or for personal study to provide quick access to essential facts, formulas, or guidelines. The term "crib sheet" originates from the practice of using small notes to aid memory during exams. These sheets can be created for various subjects, such as mathematics, science, or history, and are designed to be easy to read and understand. They help learners and professionals quickly recall important details without needing to sift through larger texts or resources.