In this lesson, a student draws the moon's shape each evening on a classroom calendar. The class then determines the pattern in the shapes over several weeks. Student understandings should be confined to observations, descriptions, finding patterns, and making predictions. Attempting to extend this understanding into explanations goes beyond the grade-level scope of NGSS and using models will be limited by the inability of young children to understand that earth is approximately spherical. Children at this age have little understanding of gravity and typically have misconceptions about the properties of light that allow us to see objects such as the moon. (Benchmarks for Science Literacy, p. 336.) Thus, these topics should be avoided. (AAAS Scienenetlinks Sky 4: The Moon the content section.)