This document outlines a learning unit on the natural environment of mountains. The unit will involve 10 hours of lessons across several disciplines like language, mathematics, art, and history. Students will learn about mountain landforms, plants, animals, and human impacts through methods like conversation, games, problem-solving, and a hiking field trip. Assessment involves riddles about mountain plants and animals, as well as a math word problem calculating distances between trees. The overall goal is for students to understand and describe mountain ecosystems.