Locate a window with a view of the eastern horizon. You will need a sun-facing window. Lab groups will tape their plastic to the window and trace the outline of the horizon. Afterwards they will use their tracing to recopy on white paper. Once a week at sunrise, mark the location of the sun.
Students can copy the location onto their own sheets when they come to class.
Or you may wish to have the students do this activity at home. Using information from Sunset Western Gardening or other garden book, have students research planting time of cilantro, corn, beans, and radishes. When the sun calendars are complete, students can outline preferred planting times on their pictures of the horizon. Scientists work in a very methodical fashion. Maintaining accurate records of observations and measurements is a key component in this systematic method.