The Christian homeschool astronomy curriculum Signs & Seasons: Understanding the Elements of Classical Astronomy by Jay Ryan has just been made even better with the addition of their Field Journal and Test Manual: A Workbook for Establishing High School Credit. Signs & Seasons is a Bible-based homeschool curriculum for teaching the traditional constellations, identifying the planets, and following the seasonal cycles of the Sun, Moon, and stars. The curriculum was created especially for ages 13 and up, but it is usable with younger students under parental guidance.