That would be correct! And all the technology added since has resulted in no discernible improvement in educational results.

In college, the classes were a lecture with a professor, 9 blackboards and colored chalk. Not even handouts (well, there was one on time dilation).

Calculators utterly wiped out slide rules when I was in college, though nobody learned any math from a calculator. Calculators just made for quicker work to more significant figures.