Emm. Wren used the word "rapid," which is why I was asking what she meant, exactly.

To be more specific:

"Radical" in the way HK just defined it?

"Radical" in the way Bostonian just defined it?

"Rapid" as in, to learn two or more years worth of material in a single academic year (so 2nd and 3rd grade and maybe more done in one year), maybe even after a skip?

Etc?

Val