The activity that I like the best is the design of the Unit itself: thinking about the best way of working  with my learners.
My favorite materials or resource?: I haven’t favourites. Thay change, appear and disappear so quickly!. I always love my students DISCOVER by themselves what I want. Typically any cloze activities and so do not serve me.
A key idea about CLIL: the more time you provide for this, the better.  And…  after the work done in classroom,  we should record our reflections to improve the Unit. I don’t do it, and that’s the reason because my Units aren’t good enough still.
This is a portfolio, a bit special one, yes, but you should can follow the sequence:

REA_AICLEiMaybe you prefer to listen all this in my L1.