Post may contain affiliate links to materials I recommend. Read my full disclosure statement.
The 4-Volume Critical Thinking in United States History Series teaches students how to apply logic to history by analyzing and evaluating primary sources and questioning how to discern the reliability of historical texts. I consider this curriculum to be one of the top ten best resources we used over our homeschooling years.
A separate Instruction/Answer Guide is included with each volume.
The publisher Critical Thinking Company only carries the ebook and CD versions. The book version must be obtained on Amazon, and in the book version the Answer Guide is a separate book.