Someone once told me - 2 samples per subject per month. That is the general rule of thumb I use to show "progress" for the state. I have not had a problem.
I also type up the books we read under the general headings of each historical topic, then poetry, read-alouds, chapter "on my own" reads, etc.
For ETC, I just save the "tests" at the end of each lesson. For math, I do the 2 per month and then any "tests" or review type sheet she had to do in Singapore.
Good luck! You'll learn what they want and like to see!
I am in MD