This teacher's guide provides instructions for teaching the exploratory course on masonry as part of the Technology and Livelihood Education (TLE) program in the Philippine K to 12 curriculum. It begins with background information on the overall goal of developing 21st century skills in students and preparing them for work or further education. The guide explains that TLE aims to develop technological proficiency through knowledge, entrepreneurship concepts, and work values. It notes that the 24 TLE exploratory courses focus on basic tool use, measurement, safety, and technical drawing. The guide then outlines the parts of the learning module, which consists of lessons addressing the learning outcomes and including materials, definitions, pre-tests, and post-tests to check