This is not a dig at the parent - they clearly have commitment and drive, but since they're promoting SuperMemo rather than commenting on the post, let me just say that this:
"I would did it again!!"
or this:
"Of course better english command came also with the course"
(among a choice of several examples) should tell you everything you need to know about the effectiveness of SuperMemo after 10 years of learning.
Those are grammar/style issues, though: 'did' is a tense error, and 'came also' is a reversal of the normal phrase 'also came'. (Not capitalizing 'English' is just being sloppy, as we can safely assume that they know English is a proper noun, since even non-English speakers know that.) Grammar and composition are hard to fit into the SRS framework because you need feedback on subtle errors and exposure to a wide variety of native writing. As far as vocabulary goes, which is what spaced repetition is particularly claimed to be good for, he looks fine to me. Certainly he's better off than if he had tried Rosetta Stone or something...
Nah, rather about me (sloppiness + using English only from time to time) and (this is big for grammar/style) that my native language is quite far from English in terms of lexical distance, and this creates a lot of problems when your brain (thinking in native language) translates word-by-word to other language.
Especially that I said 'better' not best/perfect etc. As someone commented, SR is not really good for grammar.
But thanks for spotting my mistakes :)
Anti-disclaimer: I'm not in any way connected to supermemo, having profits etc. It's funny that my post could have been seen as a promotion :)
But 12.5 minutes a day for 10 years is only 761 hours. The purpose of SuperMemo is to optimise for total time spent. (Of course, the specific course/material might not have been the most effective.)
But I guess that argument doesn't hold water, since rdslw is surely also exposed to a lot of other material in English.
And yes, this specific course rather wasn't the most effective one (but probably best at that time). There were multiple problems with this supermemo db: many simple phrases I already knew, but also lot of words you never use (afterwards). Also the biggest problem were circular errors (as I called them): A>B but also A>C or B>D, where my brain was struggling with one knowledge fact replacing the other one and again..
"I would did it again!!"
or this:
"Of course better english command came also with the course"
(among a choice of several examples) should tell you everything you need to know about the effectiveness of SuperMemo after 10 years of learning.