No matter how many times I look at it, only the spelling mistakes are correct.
A must-read for today's youth, who need reading comprehension and literacy skills.

The weight and importance of descriptive evaluation in school records is increasing day by day.
Is that all?
From long essays to short messages on social media, spelling is an essential skill that teenagers these days must know in order to properly express and convey their thoughts.
This book carefully selects 70 representative vocabulary words that today's Korean youth must know, and explains in detail the essential spelling rules that are often confused, difficult Chinese characters in the textbook, and even idiomatic expressions.
In particular, because it clearly explains vocabulary that is easy to confuse because of its similar pronunciation and appearance in a 'super simple' and 'super clear' three-step structure, the vocabulary is easily organized in your head just by reading it.
This book, published with strong recommendations from current elementary and middle school teachers, will be a welcome gift to students who lack confidence in spelling, have difficulty understanding the questions they read, or have struggled with unfamiliar words in non-fiction texts.

Even when you are confused about which one to use between why and why, it is not difficult to tell the difference as long as you do not lose sight of the context.
If the sentence I'm trying to say contains curiosity, I can use 'Why', which is similar to 'Why', and if not, I can use 'Why'.

Oh, that's enough! "No one-line summary?" I know some of you might be shouting.
Oh my, is there any chance?
I will give it to you right now.
Except for some reason, everything else is written as Wen!
--- pp.17-18 From “Why” and “Why”

'Si-dap-jjan-da' is a shortened form of 'Si-dap-ji-da', and means unsatisfactory due to its unsightly appearance.
However, people often misuse this word as 'shitupjjanda'.
If this word is to be recognized as standard, other words that start with 'dapda' will also have to be changed to 'dupda'.

In the movie Tazza, Kwak Cheol-yong says to Goni, “Hey, young man.
“Behave like a gentleman”
It would be weird to say that, right? "Siddupjanda" is also a weird word of the same level!
So hey, young man.
Speak like a Korean.
--- p.62 From “It’s not funny and it’s not funny”

The word 'pinch' means to put something in or insert it so that it does not fall over or fall out.
It's like putting flowers in a vase.
However, there are some people who mistakenly use 'kopda' instead of 'pinda'.
'Kkopda' is a word used when counting by counting fingers one by one or when selecting and pointing out something.
But, no one calls a "flower arrangement" "flower-shaped" (꽃꼬이), right? No one calls a "book shelf" "책꼬이" (책꼬이)? I believe no one calls a "pencil holder" "연필꼬이" (연필꼬이).
--- pp.69-70 From “Flower and Pick”

There is a shopping mall that delivers items like a rocket.
This is a place that advertises same-day delivery, saying that if you order in the morning, it will arrive in the afternoon.
However, since same-day delivery items are ordered and arrive today, some people mistake same-day for today.
The same day means 'that day' when something happens, and today means 'this day' that is passing by right now.
Let's say you put dried squid in your shopping cart at the mall to go with your beer tonight.
They said they would deliver it on the same day, but it's past midnight and there's still no news.
Why is that?
That's because you haven't made a deposit yet.

So, same-day delivery does not mean that it will be sent on the same day unconditionally, but rather that it will be sent on the same day based on a specific point in time, such as payment.
If you deposit after a week, same-day delivery will be completed on that day.
--- p.106 From “On the Same Day”

The word 'wikda' means to sweep and scold.
I've always wondered why the final consonant of '딱달하다', which means to scold someone by harshly nagging them, is always double-sided.
After learning the hidden meaning of 'wipe', my doubts were resolved.
Since the word '삭달하다' is derived from '죽다', the original form of the word must be written down.
--- pp.133-134 From “Nagging and Nagging”

These days, I spend most of my time online, so I use the clitoris a lot.
I guess it's the most comfortable
I will use the slang from now on, as it will increase my ability to communicate.
I think even those of you who can't live without the internet will be fluent in the clitoris.
But did you know that a lot of people get this wrong? Most people end the two sentences I mentioned earlier with "I think" and "I think it's true."
However, when using words with the final consonant 'ㄹ' such as '들다' and '알다' in the vocal form, the final consonant 'ㄻ' should be used instead of 'ㅁ'.

The appearance of ‘reum’ and ‘knowledge’ may seem unfamiliar and therefore feel like a rejection.
But if you think about it, it's not that strange to write 'to live' as 'life'.

--- pp.160-161 From ““Heart and Heart, Knowledge and Darkness””