The problem with the ability to write spelling words in English, which is something that other people can notice it easily when they need to make or read the book, as well as the various monitoring exercises.
The problem of being able to spell English words, which is something that can be easily noticed when reading the book or check the students as well as the various exercises.
The problem about the ability of English spelling, which is what others can notice it is easy to check or read the book of students as well as examination exercises.