User blog comment:Nnn6nnn/Drumroll please?/@comment-30004975-20171123030515/@comment-27394924-20171124025042

Exponentiation is a very important part of googology, one being a calculator may not be in use. This help students be able to solve problems, not just by tedious, repetitive multiplication, but by exponentiation. For that, I feel the first unit is the most important in Googology 1. Unit 2 (Notations and Functions) is the most important in Googology II. And in the last year, Googology III, the last unit (Literals) is most important.