Class K refers to a classification of certain types of materials or substances that are used in various fields, including education and industry. In educational settings, Class K materials often pertain to resources designed for young learners, focusing on foundational skills in subjects like math and reading. In the context of safety and regulations, Class K can also refer to specific categories of fire extinguishers, particularly those designed for kitchen fires involving cooking oils and fats. These extinguishers are essential for preventing and controlling fires in commercial kitchens and restaurants, ensuring safety in food preparation areas.