Area high school and middle school students can sign up for the third annual Google Wind Challenge through Friday.  The Wind Challenge will take place April 30 at The Dalles Civic Auditorium.  Teams of high school and middle school students from throughout the Gorge have a chance to race against the clock to build the strongest, fastest wind turbines and compete for prizes.  More than 200 students took part in the event last year.  The Wind Challenge is free to participate in, with all materials provided.  Volunteers from the community are also needed to assist students and help with judging and event day coordination.  Students and volunteers may register online at www.windchallenge.org.  A science, technology, engineering, and mathematics fair will also be on site with activities to engage students and the general public.