This document discusses laboratory teaching methods in science. It identifies two major types of laboratory work: situations where students work informally in pairs or groups with shared equipment, and demonstrations by the teacher to illustrate principles. The major goals of laboratory work are to teach observational and manual skills, improve scientific inquiry methods, and develop problem-solving abilities. Correct laboratory teaching methods include student preparation, explanations by the teacher, conducting experiments safely and properly handling equipment, observing and explaining results, writing reports, and safety. Advantages include hands-on learning, developing reasoning and observation skills, and preparing students for real-life problem solving. Disadvantages are that it is not economical of time and materials.