The Times Educational Suppliment is also generally known as the TES.
It's a newspaper circulated in the UK and its content is mainly to do with all matters educational.

This is where all state school teaching posts are advertised in Great Britain.

It is not, as its title would have you believe a suppliment in the normal newspaper sense of the word, but a stand alone publication, (during my teacher training I spent many days hunting for this magical suppliment to the normal Times Newspaper only to be told by my fellow teaching students that I had to buy it separately)

It is published in the UK on Fridays.