The elementary Apologia science curriculum series says it can be used with 6 - 12 yr olds. However, if your oldest is only 6 I'd wait a year or two to begin this series. They will understand more at an older age. If you are doing a coop with a group of kids of different ages, a 6 yr old should be able to follow right along and can glean much and have fun.
We do this independently at home (no co-op) and find that the Astronomy book is perfect starting about age 8 through the elementary years.
If your student is young don't expect them to be able to sit and do this curriculum independently. I did these as a read aloud with my boys and learned right along with them. Older students who are reading fluently for information will be able to study this with minimal input if that works better for your schedule.
Beautiful photography. Fun activities. Narrative questions and activities are included at the end of each chapter.
This series is probably my favorite elementary homeschool science curriculum. My older boys read through these books years ago and I'll be starting the series with my next son.
Supplemental materials are available to go with these books, and are very helpful: science activity kits, note-booking journals, lapbooks and more. But don't feel like you "need" them. The books are complete all by themselves. Each book includes directions on how to teach each child to create their own science notebook, as well as experiments and hands on activities.
The series specifically reflects a Christian world view.
I remember going through this book when my two high schoolers were in about 3 and 4th grades. We loved it. It was our first elementary apologia book and we went on to do several more.
I will probably read this with my now 8 yr old next year. I'm guessing my nature oriented 15 yo will even enjoy reading along again with us.
Astronomy is a good subject to study in the summer so you can more comfortably go out late at night and see the stars. If you live in town, make a point to go out to the country and see the difference in the heavens! It is amazing how bright and beautiful the sky is when there are no competing electric lights.
Example Activities: Build a solar system out of balloons.
The first part of 3 books on zoology, Flying creatures of the fifth day covers birds, beetles and honey bees. Anything with wings.
This book would be best done as a summer activity. That is when the birds and the bees abound! Homeschoolers have the benefit of "doing school" when it fits best. If you are not a homeschooler, this would be a great family activity for your summer bored kids.
This book in the series covers the underwater world of marine animals. Containing chapters on aquatic animals, whales, fish, sharks, reptiles and other water animals.
This is the third book in the Apologia Zoology books from Apologia science.
This book covers land animals. Mrs, Fulbright divides these animals in the groups given in Genesis--wild animals, livestock and "creatures that creep."
Ecosystems are covered with information on the animals that live in each.
Now here are some definite "boy" subjects. "How to tell poisonous and non-poisonous snakes apart, how to get away from a bear and more!"
I just asked my 15 yr old what he remembers about the Botany book. (we read it years ago) He said he remembered that it was "fun school". He remembered learning about the anatomy of a leaf... the "gastro vascular stuff" Sounds like he learned something!
This textbook is a study of the anatomy and physiology of the human body, from DNA and cell creation to the skeletal, muscular, digestive, respiratory, cardiovascular, nervous/endocrine, immune, and intergumentary systems.
We don't have this book yet... I've seen it repeated over and over in reviews of this whole series of science books "the parent learns right along with the kids".
These books are informative and fun. Activities and suggestions to expand the studies are interwoven throughout.
One of my sons is working through the Apologia Physical Science Curriculum this year. Physical Science is one of the highschool level textbooks. (Pages will be coming soon.) On a whim we did a video of one of the simple experiments. Not bad for video beginners. Enjoy!