(14 pages) Students will use actual eclipse data to investigate how often solar eclipses occur. Students will count how many days passed between one solar eclipse and the next solar eclipse. Students will graph this data. Based on their analysis of the data, students will determine the interval between solar eclipses. Two different graph templates are provided - one is extra large and the other is regular size. In addition, three large diagrams are included which will increase student understanding of solar eclipses.