I appreciated reading the Simply Charlotte Mason series on evaluation. The series highlights the way to employ narration to best benefit short-term memory, intermediate (or working) memory, and long-term memory. We have not always done narrations this way, and it was helpful for me to have the 'hows' laid out so succinctly.
How Much Does My Child Remember?
The Charlotte Mason Method of Narration
End of Term Exams in the Charlotte Mason Method
And while I am linking, I really enjoyed reading this post from Art on the 'whys' of CM education. His title is one of my favorite parts of the piece:
A Dangerous Adventure