It may seem a very simple activity because there are many resources on internet that we can check. The difficulty of the task was that the "pin" we had to share on the board should be "openly licensed". So there are many resources on the internet, but most of them have Copyright.
To search for my "pins"I used the web http://search.creativecommons.org , It is a very useful website that seeks resources without Copyright and you can also choose where you want to search: google, youtube, flikr, pixabay, etc.
For me, it has been a difficult and hard job search, but I think it was worth it, because at the end we have built a very useful and resourceful board.
I leave the link of the board https://es.pinterest.com/mjgsm/open-clil/ and I leave the pins that I added to the board:https://es.pinterest.com/pin/269653096417201370/