Correction: I had an incorrect ISBN number. Now correct. These are new books. No damage or use. Wrapped carefully in shipping. Science Dimensions: New Grade 3Houghton Mifflin Harcourt 2018 Unit 1: Engineering Unit 2: Forces Unit 3: Motion Unit 4: Life Cycles and Inherited TraitsUnit 5: Organisms and Their Environments Unit 6: Fossils Unit 7: Weather and Patterns ISBN: 978-0-544-71326-0