Preventing the spread of common colds involves several strategies: - Teaching children to wash their hands frequently with soap and water. - Encouraging the use of hand sanitizers when soap and water are not available. - Advising children to avoid close contact with individuals who are sick. - Promoting good respiratory hygiene, such as covering the mouth and nose with a tissue or elbow when coughing or sneezing. - Cleaning and disinfecting commonly touched surfaces and objects regularly.