TEXT: Students of the Sebastian River High School Music Department run through a full dress rehearsal of this year's Prism Concert Wednesday, Dec. 5, 2018 at the school. The Prism Concert is Sebastian River High School Music Department's largest fundraising event of the year. The 2-hour concert showcases the talents of the Concert Bands, Jazz Band, the Flag and Dance Line and the SRHS Choral Program. The Prism Concert is traditionally held the first or second week of December.