Florence Robson, Aug 12th 2015, 14:19 Verified Guru
I'm not sure if you mean teaching assistants who have just finished their year abroad, or teaching assistants who are just about to start!*
If the former, the British Council are usually good at providing a list of contact details for former assistants (who are willing to be contacted). This is so that you can get in touch with the assistant who previously worked at your school. You might also check out 'Teaching Assistants Madrid 2015' or similar on Facebook - there's almost always a group set up.
If the latter, you'll meet fellow teaching assistants at the induction days organised by the British Council. I met loads of my future friends at these, so make sure you go - if only to socialise!
*For both of these answers, I'm presuming that you are about to be spending a year abroad as a teaching assistant in Madrid.
I hope that helps!