My AP History course was excellent as well. Those were the days : )
I took AP US History in 1975-76. Very challenging, and easily my most enjoyable class in high school. Our teacher had been a university history professor. While he was no doubt a liberal, he was not the oppressive overbearing liberal who brooked no dissent from his dogma. He was quite fair and even-handed.
Unlike the poli sci profs I encountered at the college level.