Reading
The Rover Boys on Internet Archive or Project Gutenberg
For Girls, 10 Free Bobbsey Twins Books on Kindle
Explore the genre with this lesson on Ingredients of a Mystery. Several Free Worksheets are included as well as a list of suggested books. There are plenty of free mysteries for Kindle and on Google Books, including the Bobbsey Twins and The Rover Boys.
There is a little confusion about the real author of these books. In The Story of the Bobbsey Twins, you” ll read about the
Use an interactive tool from ReadWriteThink to dissect your mystery. There are writing activities too!
Writing
Mystery Writing: Write with Writers
How to Write a Mini Myster
Writing Mystery Stories The Best Mystery Writing Tips and Tricks for Kids
Science
Kids Ahead – Crime Scene Investigation Activities
Science Mystery – Educational Mysteries (and Reading)
History
The 25 Biggest Mysteries of History
The 20 Coolest Unsolved Mysteries in History
Mystery Timeline and more, including lessons and interactives.
Math
Mystery Math Pictures -Math Facts
Mystery Picture Math -Math Facts
Mystery Pictures with multiples and division.
Maths Mysteries Online Games
Math Maven’s Mysteries Home – Scholastic Various Skills and Levels, including Logic and Reasoning
Mystery Math– an online game of deductive reasoning
Critical Thinking
Solve some mysteries at Mystery Net’s Kids Site.
Mystery Fun
Make your own spy equipment!
You can find more FREE resources in my Facebook group, and learn how you can Build Your Own Homeschool Curriculum for FREE.
The Good Goat Momma 
I am so glad you found me so I could find you! First post I’ve read and I love it!
I’m so glad you loved it. Thank you for stopping by.