This document discusses different types of learning environments, including learner-centered, knowledge-centered, assessment-centered, and community-centered environments. A learner-centered environment focuses on students' prior knowledge and makes lessons relevant to their lives. A knowledge-centered environment focuses on teaching core concepts and organizing lessons to maximize understanding. Assessment-centered environments use formative and summative assessments to improve teaching and measure learning. Community-centered environments foster collaboration and lifelong learning by creating a classroom community.