In reading, writing, and arithmetic, I'd bet on an eighth grader from a one-room schoolhouse over the average High School graduate of today.`Chances are the Eight grader would do better at History and the classics, too.
I consider myself a partial graduate of the one-room schoolhouse as I had a couple of teachers in elementary school who began their teaching careers in one-room rural schools. One was my 4th grade teacher who had also taught my godfather in an actual one-room schoolhouse across the road from where I lived the first five years of my life. This teacher's methods would appall modern "educators" with her emphasis on rote learning, drills, and in-class spelling bees.
I expect Bo-bray's meltdown on such methods would be epic.