New England Conservatory student Jonas Tarm, 20, an alumnus of Highland Park High School and founding member of the Ravinia Student Marketing Board, has been commissioned to write a new orchestral work for the New York Youth Symphony, which will give the premiere in March 2015 at Carnegie Hall. Tarm was selected based in part on his work for string orchestra, Headline Hues, which had its world premiere in Estonia last year and received its American premiere last month with the NEC Symphony conducted by Paul Biss, a longtime faculty member of Ravinia’s Steans Music Institute.