I will talked about ability of Chun-Ya in last class and how to P’Pheng correct for her, it’s not wrong and I think P’Pheng had a good intention to help student but it so fast to guide for her and N’Chun-Ya is a good attitude in the wrong answer she offer see the calculation process step by step and can edit in wrong point but in always first time in mistake it a good opportunity for N’Chun-Ya can learning from her mistake and may be had more understanding if a correction in second time N’Chun-Ya can’t solved it let the assistant can guide.