

교과서를 집에 두고 왔어요.
[kjokwasʌlɯl t͡ɕipe tuko was͈ʌjo.]
I left my textbook at home.
새 교과서는 언제 받아요?
[sɛ kjokwasʌnɯn ʌnt͡ɕe patajo?]
When do we get the new textbooks?
이 교과서는 너무 어려워요.
[i kjokwasʌnɯn nʌmu ʌljʌwʌjo.]
This textbook is too difficult.
"교과서" is in the lesson "Education" (Level 35), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.