Living in Ohio, I was always impressed with my California cousins when we visited. This was back in the late 50s, early 60s.
In 4th grade, we had a daily vocabulary exercise where we'd write that week's 20 words five times. By the end of the year, we had 600-700 words in our vocabulary that you couldn't help but spell correctly.
That style of rote learning, like multiplication tables, is sneered at today.