Another trend is the incorporation of health and nutrition into the physical education curriculum. The Child Nutrition and WIC Reauthorization Act of 2004 required that all school districts with a federally-funded school meal program develop wellness policies that address nutrition and physical activity. While teaching students sports and movement skills, PE teachers are now incorporating short health and nutrition lessons into the curriculum. This is more prevalent at the elementary school level, where students do not have a specific Health class. Recently most elementary schools have specific health classes for students as well as physical education class. Due to the recent outbreaks of diseases such as swine flu, school districts are making it mandatory for students to learn about practicing good hygiene along with other health topics. Children have a primary responsibility of attending school and providing evidence that they are achieving the content standards of their given grade level. If children engage in unhealthy behaviors like poor eating habits, obtaining an insufficient amount of sleep, or overindulging in screen time or other sedentary behaviors, they are less likely to experience developmentally appropriate learning.