All Thai teachers had to sit a CEFR examination and the results were pretty bad. Most of them only scored A 1 and a few had Nil....
That was the time when I had to prepare a lot of seminars for high school and primary school teachers.
1. You can make a self-assessment which includes a grammar and a listening part for an individual student and see how he/she scores, for example, great to check students' English ability.
2. You can get into each level's vocabulary and use each section for listening skills ( British English).
3. The website is still under construction and will be finished in 2018. Here the Assesment grid:
https://rm.coe.int/168045bb52
Cambridge English exams by CEFR level
http://www.cambridgeenglish.org/exams/cefr/cefr-exams/?hc_location=ufi
4. Make your grammar and listening test here:
http://www.examenglish.com/CEFR/cefr.php
5.