ASSESSMENT OF EFL STUDENTS is especially important. There is an international standard where assessment levels are divided into:
Beginner, High Beginner, Elementary
Intermediate, Advanced.
However, it may be important to break these general assessments into skills assessments: I think it important in my teaching that I have a strong set of assessments that guide my teaching.
Examples of ESL/EFL Rubrics
What kind of Assessments do you use?