Greg Macdonald has taught Physics and Grade 9 and 10 Science for the past 14 years, first at St. Catharines Collegiate and more recently at Laura Secord Secondary School in St. Catharines, Ontario. In addition to attending the OAPT conference (almost) every year, Greg attended the Perimeter Institute EinsteinPlus conference in 2008 and is currently a member of the Ontario Teacher Associates network for Perimeter. Greg's other interests include astronomy, swimming and trying with limited success to convince his three daughters to become science geeks like Dad.