Discovering Design with Earth Science SetRecorded Classes are available for this subject. The classes are taught by Mrs. McKeeman. There are two recordings per chapter of the textbook. This laboratory based earth science course can be used for either eighth or ninth grade. Most homeschooled students should be ready for it in eighth grade, but privately and publicly schooled students will be more comfortable with it in ninth grade. It covers the general properties of the earths geosphere,