Sally did bio, yujin and Seoyun dis earth and space science Andy had finished the research he needed to do for this class in the first 20mins of class hence no photos he played chess with the boys. Subin did her bio research too but helped out Eunju and See yoon with maths, as did Seoyun. Gaeul also did maths mostly on her own but joined the girls helping each other near the end.