The Big Fat Middle School Math Workbook: 600 Math Practice Exercises
We have been homeschooling our kids since 2008. I am still teaching 4 of the 11. This book is what I am using for one of the math 'classes'. All you need to add is a notebook, pencil, and calculator.
The Big Fat High School Algebra 1 Workbook: 400+ Algebra 1 Practice Exercises
Just like the Middle School Math Workbook, I use this for more advanced lessons. These books make it simple and more affordable to homeschool.
Life Skills Activity Book - For Active & Creative Kids - The Thinking Tree: Fun-Schooling for Ages 8 to 16
When I am not using books I create, I like to use Thinking Tree books to help the kids keep track of their learning. I love the layout and illustrations.