A portfolio illustration. My mother is a teacher, I am well-versed in lice breakouts in schools. =P
click for a larger view!
I filmed myself scratching like a maniac for the poses here, sketched each kid separately on layout paper, and then combined them in Photoshop, printed out my sketch and traced it onto watercolour paper. I'm using Arches 300gsm Medium, but I don't like it too much. It slows me down as I have to do extra layers of colour to keep the colours vibrant, and touch up the inking when I'm done. Border and inaccurate lice were added in Photoshop.