I read an article today about how it is helpful to take an existing color painting and then paint a black and white study from it (matching the values that are apparent in the color version). An "after- the-fact" black and white value painting (from a previous color study) can indicate whether or not you have a grasp of matching values. Also, learning to look for the darkest dark and the lightest light right away is key to a strong design. Doing an exercise like this can help us to think more about distinct values.
(Individual steps for my attempt at value painting are n the post below this one).
I made some compositional changes in my after-the-fact painting. After consideration, I'm pretty sure the compositional changes I made to in the value painting were not improvements. However, I did pretty well in matching the values. I want to do even better next time.. I will do this exercise again!