In grade four, students learn about nutrition and physical activity, two important factors in their healthy growth and development. They learn about healthy food choices, nutrients, and the many influences on their food choices. They learn to monitor their physical activity and ways to increase the amount of time they are physically active. Students learn how to prevent many types of injuries by using appropriate safety equipment and avoiding or reducing risks. They plan responses to emergencies and natural disasters, identify trusted adults, and practice conflict resolution techniques. They learn skills to avoid and report bullying and harassment and to resist involvement in gang activities. Students also learn about the harmful effects of alcohol, tobacco, and other drugs and ways to cope with situations involving them, including refusal skills.