Demo Class (Primary Math) at Po Leung Kuk Chee Jing Yin Primary School on 2013JUN14 Jul 5, 2020 | 小學 | This demo class was presented to the delegates from six schools in Macau, during their field trip to Po Leung Kuk Chee Jing Yin Primary School (保良局朱正賢 … source Tags: 2013JUN14CheeClassDemoJingKukLeungMathPoPrimarySchoolYin保良局朱正賢小學