I never thought of the grades of scientology going up the grades as you say and never quite connected those dots with high school, but Hubbard certainty paralleled it. I mean I went to grade school, it was grades 1-5 back in the day, and onto high school, grades 6-8, and then college.
If one remembers the old hubbard scientology course known as HQS, everybody was supposed to do it. In that course there a TR known as TR7 or high school indoctrination.
https://stss.nl/stss-materials/English/Courses Read on Screen EN_CS_CR/EN_CS_CR_Hubbard_Qualified_Scientologist__HQS.pdf
It's on page 70 of the pdf.
But for me, and as ITYIWT, TE, PG have said, I never felt hypnotized with auditing.
I think, the only hypnosis that occurs is not hypnosis but agreement. Hubbard said the most important part of the ARC triangle was communication. But not true, the most important part was getting agreement. And that's all Hubbard tried to do. I'm not saying the ARC triangle is true, I'm only saying getting agreement is true to get a group going or become something you are not, or be something you are not........
There have been lots and lots of attempts by Hubbard and the COS is to get agreement, but only a small minority of the population have agreed.
We wus the suckers in the end. But I'm OK, we all get suckered.