Grades 6-8
Biology for Every Kid
In its segment on "Experiments that Teach Us About Ourselves: The Amazing Human Body" this book provides 35 experiments about the body (the other segments of the book are about plant and animal life. While certainly not a comprehensive anatomy course, the book does provide interesting and simple experiments (which can easily performed at home with fairly ordinary materials) that would provide a helpful supplement to the study of anatomy.
Wild Animals Coloring Book
A very nice, detailed and academic-oriented coloring book for learning about wild animals. In addition to beautiful line drawings of 47 different animals from around the world, the text provides common and scientific names and details about appearance, location, habits, size, etc. The index includes both common and scientific names as well, for easy look-up. Illustrations are royalty free (within certain conditions) and may be copied for use within your family.
Dover offers a couple of examples of how the finished images might look:
Heroes of Virtue
The Outlaws of Ravenhurst
This is a lovely and engaging story set in early 17th Century Scotland and Colonial America. A mysterious "gray-cloaked" stranger leaves a toddler to be found by a passing priest. A young boy notices that he looks surprisingly unlike his "twin." It is a story of a boy being suddenly thrust into great challenges to faith and life. Secret passages, mysteriously changing identities and subtleties of who you can trust surround a story that stirs the blood to stand up for the faith – inspired by true stories of long ago.
The Cure of Ars
The Cure of Ars
Pyramid
Catholic National Readers: Book 6
This one contains stories like "King Solomn and the Bees", "Joan of Arc", and "Paul Revere's Ride" by Longfellow. This book does not seem to contain as many additional lessons like vocabulary.
Catholic National Readers
The Catholic National Readers were originally published in the 1890s by Benziger Brothers Publishing. They have been reprinted by Savio Books and Neumann Press in 1997 in hardcover editions. They are frequently compared to the McGuffey's Readers and are illustrated with charming pictures of the sort you'd expect to see in "antique" books.