Using groups when teaching CLIL is both useful and necessary, but doing it properly is not always an easy task. So you can watch this great video on group work. You can take a look at the synopsis before clicking. 

How important are attainment levels when it comes to choosing your groups? Is there an appropriate time to let children work in friendship groups? How do you decide when to intervene, and when not to?

These and many other questions are discussed, as well as looking at different strategies for organising groups and how to encourage children to develop group work skills, including a rather crafty method for keeping track of how many children have contributed in a group.