This document outlines three different taxonomies for classifying levels of knowledge, skills, and attitudes (KSA): 1. Silva's Cognitive Domain taxonomy describes 6 levels of knowledge - from remembering to creating. 2. Simpson's Psychomotor Domain taxonomy lists 7 levels of skills development - from perception to origination. 3. Harrow's 1972 taxonomy outlines 6 levels of psychomotor skills - from reflex movements to non-discursive communication. The taxonomies provide examples of each level to illustrate the progression in complexity of knowledge, skills, and abilities.