/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: mymathssir https://cdn.slidesharecdn.com/profile-photo-mymathssir-48x48.jpg?cb=1523865955 20 years Experience in teaching field.11 years experience for IB/IGCSE/O Level/A Level Specialties: MATHEMATICS http://www.ibmaths.org