Invertebrates These books are unsurpassed for clear text, brilliant illustrations, and thorough content.  The scheduled readings, vocabulary, and quiz questions are derived from these books.  You’ll be pleased to add these to your homeschool library. Invertebrates Arthropods Crayfish Earthworms Octopus Arthropods Earthworms Crayfish Octopuses The following units can be purchased separately or in a bundle package.  Each unit has two components:  curriculum and  core texts which are sold separately.  Click on a topic for more information. Invertebrates Core Text Bundle Titles included are: “What is an Arthropod?”, “Life Cycle of an Earthworm”, “Life Cycle of a Crayfish” and “The Amazing Octupus” Invertebrates Core Texts Bundle  SAVE 10%  $27.80   $25.00 Please visit our Overview page for more information about e-books. Free Sample Unit! FREE UNIT! View Cart Home Available Units Invertebrates :: ::