SummaryNSTA STEM Forum & Expo is happening from 11 July 2018, Wednesday to 13 July 2018, Friday at Pennsylvania Convention Center in Philadelphia, PA. The organizer of the event is National Science Teachers Association. The event is open to trade visitors. The estimated number of attendance is 2,500. The estimated number of exhibitors is 110. The frequency of NSTA STEM Forum & Expo is annual.