The core of 『Yoon Jae-seong's Sound English 66-Day Training』 is learning to speak by listening, not learning to write.
This book includes a process of writing down the sentences you want to learn as you hear them.
And on the back page, there are English translations and meanings for each sentence.
This is in no way a test to see if you know how to write, nor is it intended to teach you how to write.
Writing down what you hear is simply a necessary step to check how well you listen to English before attending the lecture and how well you listen after attending the lecture.
So, if you don't know how to spell it or can't hear it well, it's better to write it in Korean.
_7p, is it okay if I don't know the alphabet?

This method is very suitable for children who are learning English for the first time.
Because you can learn English through sounds just like you learned Korean, you don't have to study boringly, and because there is no prejudice against learning English, you can better focus on the sounds.
And children must learn English this way.
It is much easier to learn proper English pronunciation early on than to correct it later after you have become accustomed to our own English pronunciation.

_10p, can kids do it too?

The reason the training lasts for 66 days is because it incorporates the research results from University College London in the UK that if you repeat a certain behavior for 'at least 66 days', it can become a habit.
A research team at University College London in the UK conducted an experiment in which they had participants perform simple actions repeatedly every day.
As a result, it was revealed that it takes 'an average of 66 days' for that behavior to become a habit, which was also confirmed in an experiment conducted in the KBS special documentary 'Escape from Last Place! Habit Transformation Report'.

_11p, why 66 days?

I am an office worker who wakes up at 6 am and has to travel long distances.
Even in the early morning, when I'm incredibly busy, I turn up the volume of my lectures and get ready for work.
If you move around busily and listen and repeat for about 10 minutes, you will hear the native speaker's pronunciation and you will find yourself speaking along without realizing it.
(Omitted) Not only is the effect of practice so great, but the fact that it can be learned easily and without burden is an advantage that I have never experienced in any other English learning method.
Consistent practice is very important when learning English, but that's precisely why it's the hardest thing to do.
_92p, the biggest advantage is that it is fun.

When I first encountered English by Sound, I had doubts about whether I could actually learn English since I didn't know much about vocabulary or grammar.
I was especially worried because I had hardly ever studied English before.
(Omitted) As I repeatedly listened to the sounds and spoke them to get used to the pronunciation, I also got the bonus of getting used to the words and sentences with my mouth and ears even though I wasn't trying to memorize them.
As I started learning one or two words like a baby, I started to see that I, who couldn't even speak English at a middle school level, can now hear and repeat many words. This makes me more confident that even if it takes a long time, I will definitely be able to speak English like a native speaker.

---p.108 Even I, who knew almost no vocabulary or grammar, was able to learn.