T3G began in 2009 with 30 brave souls crammed into two rooms barely suited to 15 each, using ArcGIS Desktop 9.3 and ArcGIS Explorer Desktop. In 2012, we shifted to ArcGIS Online, and in 2013 shifted to the Esri Auditorium and phalanxes of 100, including returning alums. We now number ~475, each sharing GIS with other educators, to different degrees and in different ways.
From the beginning, change has been a hallmark. Our biggest change ever will arrive in 2017. More details will be available as soon as we can nail them down. But these are the key elements:
T3G is a powerful force in expanding the use of GIS in instruction. "First gear" began in 2009; "second gear" began in 2013; "third gear" will begin in 2017. We look forward to working closely with you!