Guide to the
Missouri's grade of an F is a reflection of the extremely vague standards written by the state Department of Education. They are both a blessing and a curse. Teachers are not held hostage to a specific list of topics/information that must be taught, giving them freedom to teach! However, it is also extremely difficult to determine what will be on the state tests because the standards are so vague. It also means that teachers who do not have the depth of knowledge to gauge what topics are significant may have poorly formed curriculum.
I'm pretty proud of my home state for having gone from an F to a B in four years, but as you note, much still needs to be done. However, as important as the African-American civil rights movement is, California also has to do a much deeper examination of the Latin-American rights movements such as the work of Cesar Chavez. I notice that your criteria don't seem to include those movements, which are arguably of similar importance in California, among other states.
I wonder if this is something which you may want to consider for future standards.