_ something that has been deliberately chosen as the subject of inquiry.
It also includes sub-questions that need a series of answers which leads to the main answer to the main research question.
Example:
Research question: Can Vietnamese secondary students benefit from having a ESL/EFL curriculum incorporating English Language Arts (ELA) of US's K-12 education?
SUB-QUESTIONS:
Why english literature is a common/popular major of US/UK/developed-nation students?
Why Vietnamese lack interest/skill of reading books and literature?
Do Vietnamese students need a kind of English-Lit/ internationalised book (as a reference/ textbook)?
How to make this kind of lesson not boring?
How much effort to creat such reference/ textbooks?
