Scholastic Science Dictionary
Not sure how to explain arthroscopy to your curious kids? Do you want to  let them learn (and maybe teach you) on their own? TheScholastic Science  Dictionaryis a fantastic reference tool for science- and nature-oriented  kids in elementary and middle school. More than 2,400 terms from biology,  astronomy, chemistry, physics, psychology, geology, and other fields are defined  with pronunciation guides, cross-references, and clear full-color illustrations  by Hannah Bonner. There might not be enough information included to write a  report on a given subject, but the definitions are a great help to young  researchers and can get the writing process flowing when other sources use  unfamiliar words. When you need to know which way a stalagmite points, theScholastic Science Dictionaryis there for you.--Rob Lightner