I've done quite a few courses offered by British Council so far and could always learn a couple of things I didn't know before.: thankyou:
I even participated in a forensic course which was pretty funny when thousands of people from all around the world are posting their thoughts about a criminal case to find out who the murder was.
This course is a free online training course and I'll join in, that's for sure.
Please see: ( there're plenty of other free courses available !!)
http://www.teachingenglish.org.uk/
If you wish to have a certificate of such a course ( not sure about the online one), you'll have to pay around 25 British Pounds and it will be shipped to you.
I only assume that such courses/certificates will also be part of your educational development, I guess we all know how much certificates are loved by our Thai colleuages.