Derek Mackrell is a Managing Editor for National Geographic Learning. He is a former teacher and teacher trainer, and has an MA in online education and a DTEFLA in English Language Teaching. Derek has more than twenty years’ experience in producing print and digital learning materials for teachers and students. He is currently based in Singapore.
Don Clyde Bhasy is a Development Editor for National Geographic Learning. In his 7 years with NGL, he has helped develop several best-selling titles including Pathways and Time Zones. Clyde has an additional 6 years of experience in the publishing industry editing books and producing academic journals. He has a BA in Communication Studies and English and is based in Singapore.