This document provides an overview of various taxonomies of learning objectives, including Bloom's Taxonomy of Cognitive Domain, Krathwohl's Taxonomy of Affective Domain, and Harrow's Taxonomy of Psychomotor Domain. It examines the six levels of Bloom's Cognitive Domain - Knowledge, Comprehension, Application, Analysis, Synthesis, and Evaluation. It also explores the five levels of Krathwohl's Affective Domain - Receiving, Responding, Valuing, Organizing, and Characterizing. Finally, it discusses Harrow's Psychomotor Domain which ranges from Reflex Movements to Origination.